Ingredients
For the cake: one and three quarters cups fine almond flour (not almond meal), one quarter cup coconut flour (adds lightness), one teaspoon baking soda, half teaspoon baking powder, one quarter teaspoon salt, three ripe medium bananas mashed very well (about one cup), three large eggs at room temperature, one quarter cup melted coconut oil or unsalted butter, two tablespoons honey or maple syrup (or one quarter cup granulated monk fruit sweetener for zero sugar), one teaspoon vanilla extract, and half teaspoon cinnamon (optional).
For the topping (optional): two tablespoons powdered monk fruit sweetener or a light dusting of cinnamon.
Equipment Needed
An 8-inch round or square cake pan, parchment paper, two large mixing bowls, a whisk, a rubber spatula, and a toothpick for testing.
Method
Preheat your oven to 175°C (350°F). Grease an 8-inch cake pan thoroughly with coconut oil or butter. Line the bottom with parchment paper for easy removal.
In a large mixing bowl, whisk together the almond flour, coconut flour, baking soda, baking powder, salt, and cinnamon if using. Break up any clumps in the almond flour with your fingers or the back of a spoon.
In a separate bowl, mash the ripe bananas very well with a fork or potato masher until completely smooth with no large chunks. Add the eggs, melted coconut oil, honey or sweetener, and vanilla extract. Whisk until the wet ingredients are fully combined and slightly frothy.
Pour the wet ingredients into the dry ingredients. Stir gently with a rubber spatula until just combined. Do not overmix—stop as soon as no dry flour remains. The batter will be thick and spoonable, not runny.
Transfer the batter to the prepared cake pan. Spread it evenly with the spatula, smoothing the top.
Bake for twenty five to thirty minutes, until the top is golden brown and a toothpick inserted in the center comes out clean or with just a few moist crumbs attached.
Let the cake cool in the pan for ten minutes. Then carefully invert it onto a wire rack, remove the parchment paper, and flip it right side up to cool completely.
Dust the cooled cake with powdered monk fruit sweetener or a sprinkle of cinnamon if desired.
Slice and serve at room temperature.
Storage
Store in an airtight container at room temperature for up to two days. Refrigerate for up to one week. This cake can be frozen for up to three months. Wrap individual slices tightly in plastic wrap and place in a freezer bag. Thaw at room temperature or microwave for fifteen to twenty seconds.
Variations
For a chocolate version, add two tablespoons of unsweetened cocoa powder to the dry ingredients and increase the honey or sweetener to three tablespoons. For a lemon version, add the zest of one lemon and one tablespoon of lemon juice to the wet ingredients. For a spiced chai version, add half a teaspoon of ground ginger, a quarter teaspoon of ground cloves, and a quarter teaspoon of ground cardamom along with the cinnamon. For a nutty version, fold in one quarter cup of chopped walnuts or pecans. For a dairy-free version, this recipe is already dairy-free when made with coconut oil. For an egg-free version, replace the three eggs with three flax eggs (three tablespoons ground flaxseed mixed with nine tablespoons water, let sit for five minutes to thicken). The cake will be denser.
Serving Suggestions
Serve with a dollop of unsweetened whipped cream and fresh berries. Spread with sugar-free cream cheese or almond butter. Enjoy alongside a cup of hot tea or black coffee. Crumble over sugar-free vanilla yogurt for a parfait.
Tips for Best Results
Use fine almond flour, not almond meal. Almond meal is ground with the skins on and produces a heavier, grainier cake. Fine almond flour (blanched, skinless) creates the light, melt-in-your-mouth texture you want.
Do not skip the coconut flour. Coconut flour is highly absorbent and helps give structure to gluten-free cakes. A small amount balances the moisture from the bananas and eggs. Too much will make the cake dry, so measure carefully.
Use very ripe bananas with brown spots. The riper the banana, the sweeter and softer it is. This allows you to use less added sweetener. Overripe bananas also mash more smoothly.
Mash the bananas completely. Lumpy bananas create pockets of dense, wet fruit that can make the cake heavy. Take an extra minute to mash until perfectly smooth.
Do not overmix the batter. Almond flour cakes can become dense if overworked. Stir just until the dry and wet ingredients come together. A few small lumps are fine.
Check for doneness at twenty five minutes. Almond flour cakes brown faster than wheat flour cakes. If the top is dark but the center is still wet, loosely cover the pan with foil and bake for five to ten more minutes.
Let the cake cool completely before slicing. Warm almond flour cakes are very tender and can crumble. Cooling allows the structure to set.
Adjust sweetness to your preference. Taste the batter before adding sweetener. Very ripe bananas may be sweet enough on their own. Add honey, maple syrup, or monk fruit sweetener gradually. You can always add more, but you cannot take it away.
Use a sugar substitute that measures cup for cup like sugar. Monk fruit sweetener, erythritol, or allulose work well. Avoid stevia drops unless the package provides a conversion for baking—it is much more concentrated and easy to overdo.
Serve this cake the same day for the best texture. Almond flour cakes are most tender and moist on the day they are baked. Leftovers are still delicious but may be slightly denser. A quick ten seconds in the microwave restores the fresh-baked feel.