Banana bread is the bake Canadians reach for when three bananas on the counter turn spotty and sweet, but going gluten-free changes the rules. Without gluten, a loaf can bake up gummy in the middle, sink as it cools, or crumble at the first slice. This gluten free banana nut bread recipe fixes all three problems. It uses a proven flour blend, a small amount of xanthan gum for structure, and very ripe bananas for moisture and flavour, so the loaf slices cleanly and tastes like the classic you remember.

Everything here is measured for a Canadian kitchen, in grams and millilitres first, with cup measures alongside. You will get the full recipe up front, then clear sections on flour blends, almond and oat flour, walnuts, banana ripeness, and the gentle mixing method that keeps the crumb tender. There are also storage and freezing steps, easy variations, and honest answers to the questions gluten-free bakers ask most, including why loaves turn gummy and how to stop it.

Slices of gluten-free banana nut bread with a moist crumb and walnut pieces on a wooden cutting board

Photo: Shisma, CC BY 4.0, via Wikimedia Commons

Table of Contents

1. The Recipe, Step by Step

A whole golden banana nut loaf with visible walnut pieces, fresh from the oven

Photo: Shisma, CC BY 4.0, via Wikimedia Commons

Ingredients (one 23 × 13 cm / 9 × 5 inch loaf, about 10 slices): 3 very ripe bananas, mashed, about 340 g (1½ cups); 250 g gluten-free flour blend (about 2 cups, see Section 2); ¾ teaspoon xanthan gum, only if your blend does not already contain it; 1 teaspoon baking soda; ½ teaspoon baking powder; ½ teaspoon fine salt; 1 teaspoon cinnamon; 150 g sugar (about ¾ cup), half white and half brown if you like; 80 g melted butter or 80 ml neutral oil; 2 large eggs at room temperature; 60 ml milk or plain yoghurt (¼ cup); 1 teaspoon vanilla extract; 75 g chopped walnuts (about ¾ cup), plus a small handful for the top. Prep takes about 15 minutes, and the whole loaf costs roughly $6 to $8 to make with Canadian grocery prices.

Method: Heat the oven to 175°C (350°F) and line the loaf pan with parchment, leaving the ends long so you can lift the loaf out. Whisk the flour blend, xanthan gum if using, soda, baking powder, salt, and cinnamon in a large bowl. In a second bowl, whisk the mashed banana, sugar, melted butter, eggs, milk, and vanilla until smooth. Pour the wet mixture into the dry and fold with a spatula just until no dry flour shows, then fold in the walnuts. Rest the batter in the bowl for 20 to 30 minutes; this step matters and Section 8 explains why. Scrape the batter into the pan, scatter the extra walnuts on top, and bake for 55 to 65 minutes, until a skewer in the centre comes out clean and the middle reads about 96°C on a thermometer. If the top browns early, tent it loosely with foil for the last 15 minutes. Cool in the pan for 15 minutes, then lift onto a rack and cool at least 1 hour before slicing, because the crumb is still setting and warm slices turn gummy.

2. Rice Flour Blends: The Reliable Base

Fine white rice flour in a metal pan with a scoop, the base of a gluten-free flour blend

Photo: Nithyasrm, CC BY-SA 4.0, via Wikimedia Commons

No single gluten-free flour behaves like wheat flour on its own, so a blend does the job by teamwork. White rice flour gives the loaf body, potato starch keeps the crumb soft, and tapioca starch helps the crust brown and adds a little chew. A simple home mix is 300 g white rice flour, 100 g potato starch, and 100 g tapioca starch, whisked together and kept in a sealed jar. Ready-made Canadian blends such as Bob’s Red Mill 1-to-1 or President’s Choice gluten-free flour follow the same idea and cost about $6 to $9 per kilogram. Finely ground flour matters: a coarse, stone-ground rice flour can leave the crumb gritty, and the 20-minute batter rest in this recipe is what lets the grains drink in moisture and lose that sandy feel.

If you bake for someone with celiac disease, the blend is also where safety starts. Buy flour labelled certified gluten-free, not just a bag from a bulk bin, because shared scoops and bins are a common source of cross-contact with wheat flour. In Canada, a gluten-free claim means the food contains less than 20 parts per million of gluten, and certified products are tested to that standard. Keep your GF flour in its own sealed container, and use clean measuring cups rather than ones dipped in the wheat flour jar earlier that day. If you also bake yeast loaves, our gluten-free bread baking guide for Canada uses the same blend logic for sandwich bread and dinner rolls.

3. Almond Flour: Rich, Moist, and Best in a Blend

A pile of shelled almonds, the nuts ground to make almond flour for gluten-free baking

Photo: Public domain, via Wikimedia Commons

Almond flour is simply almonds ground very fine, and it brings fat, protein, and a gentle sweetness that rice flour cannot. In this loaf, the sweet spot is a partial swap: replace 50 to 60 g of the flour blend (about ½ cup) with almond flour and keep everything else the same. The crumb comes out richer and stays moist a day longer, and the top colours a little deeper because almonds brown faster than rice flour. Watch the loaf near the end of the bake and use the foil tent if the top is darkening quickly. Almond flour costs about $12 to $15 per kilogram in Canada, so using it as a partner rather than the whole base keeps the loaf affordable.

What does not work is building the whole loaf on almond flour alone, a question that comes up often on baking forums. Almond flour has no starch structure to hold the rise, so a full swap usually bakes up heavy, oily, and sunken in the middle, no matter how fresh your baking soda is. It also drinks liquid differently, so the batter needs less milk, which throws off the rest of the recipe. Treat almond flour as the flavour booster, not the foundation. Store the open bag in the fridge or freezer, since the natural oils in ground almonds can go stale at room temperature, and give it a sniff before baking: fresh almond flour smells sweet and nutty, never sharp or bitter.

4. Oat Flour: Soft, Mild, and Gentle

Rolled oat flakes close up, ground at home to make certified gluten-free oat flour

Photo: Kateshortforbob, via Wikimedia Commons

Oat flour gives banana bread the softest, mildest crumb of the three flours in this guide, with a faint natural sweetness that suits banana very well. You can buy it ready-ground or make it in a minute: blitz rolled oats in a blender or food processor until they turn to a fine powder, about 130 g of oats for each 125 g of flour. Use it for up to half of the flour blend in this recipe, roughly 125 g, and keep the rest as the rice flour blend so the loaf still has structure. Oat flour absorbs a lot of liquid and keeps absorbing as it sits, which is one more reason the batter rest helps: the oats hydrate fully before baking instead of stealing moisture from the crumb in the oven.

One rule is not negotiable for celiac readers: oats must be labelled certified gluten-free. Plain oats are naturally free of gluten, but they are usually grown in rotation with wheat and moved through shared trucks, mills, and packaging lines, so regular oats and regular oat flour often carry traces of wheat. Certified products are grown and handled under a purity protocol and tested, and they are easy to find in Canadian stores from brands such as Only Oats or Bob’s Red Mill. If anyone at your table has celiac disease, read the bag every time, even for a brand you trust, because supply chains change. A loaf made with too much oat flour and too little rest can also turn gummy, so keep the swap at half and do not skip the resting step.

5. Xanthan Gum: The Glue That Replaces Gluten

Smooth, pale gluten-free batter resting in a steel bowl, held together with a little xanthan gum

Photo: Thamizhpparithi Maari, CC BY-SA 4.0, via Wikimedia Commons

Gluten is the stretchy net that traps air in a wheat batter and stops a loaf from crumbling. Xanthan gum, a fine powder made by fermenting simple sugars, is the stand-in most gluten-free bakers rely on. It thickens the batter, holds the walnut pieces in suspension instead of letting them sink, and gives the cooled crumb enough spring to slice without falling apart. For quick breads like this one, the right amount is small: ½ to 1 teaspoon per 250 g of flour blend, and this recipe uses ¾ teaspoon. Always whisk it through the dry flour before any liquid goes in, because xanthan that meets liquid first clumps into slippery beads that never mix out.

More is not better, and too much xanthan is a classic cause of the gummy, almost wet crumb people complain about in gluten-free banana bread. Check your flour blend first: many Canadian blends already include xanthan gum, and adding the recipe’s measure on top doubles the dose. If the bag lists xanthan or guar gum, skip the extra entirely. No xanthan in the house? Guar gum swaps in at the same amount, and 1 teaspoon of psyllium husk powder whisked into the flour gives a slightly heartier crumb. Ground flaxseed also binds, but in a quick bread it works better as a helper gel (1 tablespoon flax stirred into 3 tablespoons warm water, rested 5 minutes) than as a full replacement.

6. Walnuts and Pecans: Picking the Crunch

A whole walnut, a halved walnut, and a walnut kernel ready to chop for banana bread

Photo: Ivar Leidus, CC BY-SA 4.0, via Wikimedia Commons

Walnuts are the classic nut for banana bread because their slight bitterness balances the sweet crumb. Buy pieces or halves and chop them coarse, about the size of a pea, so you get crunch in every slice without heavy chunks that drag the loaf down. The one step worth the extra pan is toasting: spread the chopped nuts on a small tray and toast at 175°C for about 8 minutes, until they smell warm and nutty. Toasting deepens the flavour and, just as important in a soft gluten-free crumb, keeps the nuts crisper after baking. Toss the cooled nuts with a spoonful of the flour blend before folding them in; the light coating helps them stay scattered through the loaf instead of sinking to the bottom.

Pecans are the natural Canadian swap, a little sweeter and softer than walnuts, and they pair beautifully with maple in the variation below. A bag of walnut or pecan pieces costs about $5 to $7 at most grocery stores, and both nuts keep best in the freezer, where their oils stay sweet for up to a year. Rancid nuts ruin a loaf quietly, so taste one before you chop: it should taste rich and mild, never bitter or paint-like. If you need a nut-free loaf, leave the nuts out and add 60 g of certified gluten-free rolled oats or a handful of sunflower seeds for texture instead, keeping the total add-ins about the same so the batter balance does not change.

7. Banana Ripeness: The Browner, the Better

Three very ripe bananas with heavy brown speckles on a granite counter, ready for mashing

Photo: Meltdown reverter, CC BY-SA 4.0, via Wikimedia Commons

Bananas do three jobs in this loaf: they sweeten it, moisten it, and carry the flavour. All three get stronger as the fruit ripens, because the starch in a banana slowly turns to sugar while the flesh softens. The right bananas for baking look almost past saving: yellow skins covered in brown speckles, deep brown patches, even a mostly dark peel is fine as long as the fruit inside smells sweet and not sour. A firm yellow banana gives a pale, mild loaf that needs the full sugar in the recipe, while a properly ripe one lets the crumb taste rich with no extra sweetness. Weigh the mashed fruit if you can; 340 g is the amount this recipe is built on, and a big handful more can tip the batter from moist to soggy.

Frozen bananas are a smart Canadian habit, since they let you save ripe fruit in summer and bake in January. Thaw them in a bowl, because they release a lot of dark liquid as they defrost. Here gluten-free baking differs from the classic advice: pour off about half of that liquid before mashing, or the extra water makes the crumb gummy, and if you keep all the liquid, cut the milk in the recipe to a splash. Bananas still too yellow? Lay them unpeeled on a tray at 150°C for 15 to 20 minutes until the skins blacken and the fruit softens, then cool before mashing. For a deeper look at what bananas, soda, sugar, and eggs each do in a classic wheat loaf, our guide to banana loaf ingredients walks through them one by one.

8. Mixing Method: Gentle Folds and a Short Rest

Mashed banana in a blue bowl beside a mixing bowl of batter and a parchment-lined loaf pan

Photo: Personal Creations, CC BY 2.0, via Wikimedia Commons

Banana bread uses the muffin method: wet ingredients in one bowl, dry in another, then the two combined with as little stirring as possible. With wheat flour, overmixing builds tough gluten. With gluten-free flour the risk is different but just as real: hard beating whips in more air than the weak batter can hold, so the loaf rises fast, then collapses and sinks in the middle as it cools, and overworked starch turns the crumb dense and gummy. Fold with a spatula, turning the bowl as you go, and stop the moment the last streak of flour disappears, usually 20 to 25 strokes. Mash the bananas with a fork and leave a few small lumps; blending them into a thin liquid adds free water to the batter and makes the crumb heavier.

Then comes the step most recipes skip: rest the mixed batter for 20 to 30 minutes before it goes into the pan. Rice and oat flours hydrate slowly, and the rest lets them absorb the banana and milk fully, so the loaf bakes with a smooth, even crumb instead of a gritty one, and the centre sets instead of staying wet. Two more habits protect the middle of the loaf. Use room-temperature eggs so the batter is not shocked cold, and do not open the oven door in the first 45 minutes, because a rush of cool air can drop the centre before it sets. If a past loaf sank, check your baking soda as well: soda older than about six months after opening loses strength, and weak soda is a quiet cause of flat, sunken loaves.

9. Storage and Freezing: Keeping Every Slice Fresh

A toasted slice of banana bread with melting butter on a white plate, served from frozen

Photo: Andy Li, CC0, via Wikimedia Commons

Gluten-free bread stales faster than wheat bread, so storage is part of the recipe. First, let the loaf cool completely before wrapping; wrapping a warm loaf traps steam and turns the crust soft and the crumb gummy. Once cool, wrap the whole loaf or the remaining half tightly in plastic wrap or foil and keep it on the counter for up to 2 days. Avoid the fridge for the whole loaf, because cold air dries this crumb out faster than the counter does. A slice of plain bread pressed against the cut end, an old bakery trick, also helps keep the exposed crumb from drying between servings.

For anything longer, the freezer is the right home. Slice the cooled loaf, lay small squares of parchment between the slices, and seal them in a freezer bag with the air pressed out; the loaf keeps well for up to 3 months. The slices go straight from freezer to toaster, and toasting is the best way to serve gluten-free banana bread anyway, because the heat crisps the edges and refreshes the crumb so it tastes freshly baked. A frozen slice also warms in about 30 seconds in the microwave, though it will be softer. Whole loaves freeze well too: wrap in plastic, then foil, thaw overnight in the fridge still wrapped, and warm slices as you need them.

10. Variations: Chocolate Chip, Maple Pecan, and Muffins

A thick slice of dark chocolate banana loaf on a plate, the chocolate chip variation

Photo: Andy Li, CC0, via Wikimedia Commons

Chocolate chip: fold in 85 g (about ½ cup) of chocolate chips with the walnuts, or swap the nuts for chips entirely. Check the chip bag for a gluten-free claim, since a few brands use shared lines. Maple pecan, the Canadian version: use pecans instead of walnuts, replace the sugar with 125 ml maple syrup, and cut the milk back to 2 tablespoons so the batter keeps its balance; brush a little extra syrup over the warm top for shine. Cinnamon swirl: pour in half the batter, scatter 2 tablespoons of sugar mixed with 1 teaspoon of cinnamon, add the rest of the batter, and swirl once with a knife. Keep total add-ins near 75 to 100 g so the loaf still rises well.

Muffins: the same batter fills a 12-cup muffin tin lined with papers. Bake at 175°C for 20 to 24 minutes, until a skewer comes out clean, and cool in the tin for 10 minutes before moving them. Muffins freeze even better than the loaf and thaw in about an hour on the counter. Dairy-free: use the oil option in the recipe and swap the milk for an unsweetened oat milk labelled gluten-free, or use coconut milk for a richer crumb. Peanut butter swirl: drop 3 tablespoons of warmed peanut butter over the batter in the pan and marble it with a knife. Each variation keeps the same flour blend, rest, and bake logic, so once the base loaf works in your oven, the rest is just flavour.

Frequently Asked Questions

Why is my gluten-free banana bread gummy in the middle?

Four causes cover most cases: the loaf was underbaked, it was sliced while still warm, the bananas added too much liquid, or there was too much xanthan gum. Bake until the centre reads about 96°C, weigh the mashed banana at about 340 g, drain some liquid from thawed frozen bananas, and check whether your flour blend already contains xanthan before adding more. Cooling the loaf fully, at least 1 hour, lets the crumb finish setting.

Why did my loaf sink in the middle?

A sunken centre usually means the middle was still raw when the loaf came out, the baking soda was old, the oven door was opened early, or the batter held too much banana or liquid for the flour. Measure carefully, test soda by stirring a pinch into hot water to check it bubbles, leave the door closed for the first 45 minutes, and give the loaf the full bake time before testing. A slight dip on top is normal; a wet dip means it needed more time.

Which flour works best: a blend, almond flour, or oat flour?

A rice flour based blend gives the most reliable structure and the closest result to a classic loaf, which is why this recipe is built on one. Almond flour is best as a partial swap of 50 to 60 g for richness, not as the only flour, because a loaf made only from almond flour tends to bake dense and sunken. Oat flour can replace up to half the blend for a softer crumb, as long as it is certified gluten-free.

Is oat flour safe for someone with celiac disease?

Only when the oats are labelled certified gluten-free. Regular oats often pick up wheat during growing, transport, and milling, even though oats themselves do not contain gluten. Certified products follow a purity protocol and are tested, and in Canada a gluten-free claim means under 20 parts per million of gluten. For a celiac household, also use a clean pan, clean utensils, and flour stored away from wheat flour.

How long does this loaf keep, and can I freeze it?

Wrapped well, the loaf keeps about 2 days on the counter. For longer storage, slice it, layer parchment between the slices, and freeze in a sealed bag for up to 3 months. Toast slices straight from the freezer for the best texture. Avoid keeping the loaf in the fridge, which dries gluten-free crumb faster than room temperature storage.

Final Thoughts

A good gluten free banana nut bread recipe is not about a magic flour. It is about a balanced blend, a small and careful dose of binder, bananas that are properly ripe, and a batter that is folded gently and rested before baking. Get those four things right and the loaf comes out moist, sliceable, and full of toasted walnut crunch, with no gummy centre and no sunken middle.

Bake the base loaf once, then make it yours with the maple pecan or chocolate chip variation. Slice and freeze what you will not eat in two days, and breakfast is sorted for weeks. Once gluten-free baking starts to feel this normal, the rest of the kitchen follows; even holiday cooking is covered, right down to our gluten-free gravy recipe for the big dinners.

Sources

An unsliced banana nut loaf with a deep golden crust cooling on a wooden board

Photo: Shisma, CC BY 4.0, via Wikimedia Commons

Well-spotted ripe bananas hanging on a wooden banana hook, perfect for baking day

Photo: Sheila Sund, CC BY 2.0, via Wikimedia Commons

A cafe-style slice of banana bread with caramel sauce and yoghurt on a grey plate

Photo: Andy Li, CC0, via Wikimedia Commons


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