Gluten Free Heritage

When Leftovers Lead to Innovation

This gluten-free sweet potato banana bread came to life the way many of my best recipes do, out of necessity and a refusal to waste good food. I had two small bananas sitting on the counter, browning faster than I could use them, and half of a baked sweet potato leftover from dinner the night before. Instead of tossing either one, I decided to combine them into something new.

I already had a tried-and-true banana chocolate chip quick bread recipe that had become my first paid order, thanks to an amazing reaction from my husband’s co-worker, who has celiac disease. That original recipe gave me the confidence to experiment. This time, I omitted the chocolate chips, added an extra egg for better binding, and replaced some of the mashed banana with sweet potato puree. The result was a moist, tender sweet potato loaf with natural sweetness, lovely warm spices, and a perfect amount of sweetness that doesn’t rely on white sugar.

Building on a Proven Foundation

If you’ve tried my gluten-free banana chocolate chip bread or the pumpkin-spiced quick bread that started it all, you’ll recognize the bones of this recipe. The method is simple and forgiving, ideal for bakers who want the best results without a complicated process. This banana sweet potato bread recipe uses the same straightforward approach: combine your dry ingredients in one large mixing bowl, combine your wet ingredients in another large bowl (such as the Bosch Universal Plus Mixer or Artiste), then incorporate the dry ingredients into the wet mixture until well combined.

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The beauty of this sweet potato bread recipe is its flexibility. You can use all ripe bananas if that’s what you have on hand, or go up to a 50/50 blend of banana and sweet potato for a total of 300 grams. I’ve made it both ways, and both versions deliver a perfect loaf with lots of health benefits and flavor.

Choosing the Right Ingredients

This recipe relies on gluten-free flours I mill fresh at home, specifically oat and sorghum, using my NutriMill. If you don’t mill your own, you can substitute your favorite gluten-free flour blend, but I’d encourage you to dive into milling for all of its health benefits. This recipe does not require xanthan gum, which I prefer to omit whenever possible. It even holds up without psyllium husks powsder, thanks to the binding from eggs. 

For fat, I used avocado oil, though melted coconut oil or olive oil could work just as well, depending on what you have on hand. Some bakers prefer vegetable oils or even nut butters for added richness, but I find avocado oil gives a neutral flavor that lets the sweet potato and banana shine.

The sweetener in this loaf comes primarily from the natural sweetness of the fruit and sweet potato, with the exception of brown sugar, which adds depth and moisture; coconut sugar would work quite beautifully in this recipe as well. 

I used a cashew almond milk to keep this loaf dairy-free, but any non-dairy milk or regular milk will work. If you’re making this vegan sweet potato banana bread, swap the eggs for flax eggs by mixing two tablespoons of ground flaxseed with six tablespoons of water and letting it thicken for about five minutes.

The Method

Start by combining your dry ingredients: freshly milled oat flour, sorghum flour (or your go-to all-purpose baking flour if you prefer regular flour), baking powder, baking soda, salt, and cinnamon. You can also add a pinch of ground cloves to deepen the spice profile.

In a separate large mixing bowl, mix your ripe bananas and sweet potato together until smooth. I start with this step in my Bosch Universal Plus Mixer. However, you can do this by hand or with a food processor to make a completely smooth sweet potato puree. Into the mixer, add your wet ingredients: brown sugar, oil, milk, apple cider vinegar, and eggs. Make sure your eggs are at room temperature for better incorporation.

Slowly add the dry ingredients to the wet ingredients, stirring gently until just combined. Overmixing will result in a dense loaf, so stop as soon as you no longer see streaks of flour.

Pour the batter into an oiled 8×4 standard loaf pan. I absolutely love my cast-iron enameled 8×4 bakers from NutriMill, with the Bread Sling for easy removal. Bake at 350 degrees for 55 to 60 minutes, checking the internal temperature with a thermometer. You’re looking for 200-205 degrees for a fully baked loaf. If the top is browning too quickly, you can tent it with foil halfway through the cooking time.

Let the loaf cool completely in the bread pan on a wire rack before slicing. This step is essential because it allows the structure to set, resulting in clean slices rather than crumbling.

Storing and Serving

Once cooled, this banana sweet potato loaf can be stored in an airtight container at room temperature for up to 3 days or refrigerated for up to 1 week. It also freezes beautifully, wrapped individually in plastic wrap, making it a great option for quick breakfasts and work/school lunches. 

I like to slice it thick and enjoy it at any time of day, toasted for breakfast, plain as a snack, or warmed with a little butter (or dairy-free spread) in the afternoon. You could also turn this into banana sweet potato muffins by dividing the batter into a muffin tin and reducing the baking time to about 25-30 minutes.

Why This Recipe Works

This free recipe proves that gluten-free baking doesn’t have to be complicated or rely on all-purpose flour to succeed. By using fresh-milled gluten-free flours, whole food ingredients like leftover sweet potatoes, and a simple method, you can create a loaf that’s nourishing, delicious, and accessible.

The combination of banana and sweet potato brings moisture, fiber, and natural sweetness without spiking blood sugar the way a recipe loaded with white sugar might. It’s a loaf that feels indulgent but is made with intention.

Whether you’re gluten-free by necessity or by choice, this banana-sweet-potato quick bread is worth adding to your rotation. If you’re looking for a community of fresh-milled, gluten-free baking support, join us at Fresh Milled Flour | Gluten Free Grains.

Full Recipe Card

If leftover sweet potatoes or browning bananas are sitting in your kitchen right now, this is your sign to turn them into something worth sharing.

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