Preheat oven to 350 F. Line a 12-count muffin tin with silicone or non-stick paper liners.
Peel bananas and add to a large mixing bowl. Use a fork to mash bananas until there are no large lumps. Measure out 1 cup of mashed banana and return to the mixing bowl, discarding any excess.
Add the coconut sugar, oil, almond milk, eggs, and vanilla to the bowl with the bananas. Mix together until well incorporated.
In a separate mixing bowl, add the almond flour, cassava flour, coconut flour, instant espresso, baking powder, and salt. Whisk together until there are no lumps.
Pour the dry ingredients into the bowl with the wet ingredients and stir until there are no lumps or streaks of dry ingredients. Avoid over-mixing.
Divide the batter among the muffin wells, ensuring each is about ¾ of the way full.
Place muffins in the oven and bake for 25-30 minutes (27 minutes was perfect for my oven), or until the muffins can be pierced with a toothpick and come out cleanly. Remove from the oven and allow to cool.
Notes
Try adding ½ cup of dark chocolate chips for chocolate banana espresso muffins!
You want super ripe (I'm talking all sorts of spots!) and to ensure your recipe is sweet and moist.
If using frozen bananas, thaw completely either on the counter or in the microwave. Once thawed drain off some of the excess water before adding to the recipe. Measure after mashed and drained.
Because of the espresso powder, these muffins will appear dark. Don't worry, they are most likely not burning! To make sure they are cooked all the way through, I will prick a muffin with a toothpick to see if it comes out clean. If the toothpick is clean then the center of the muffin is cooked through and the muffins are done.
A high-quality, lighter roast espresso works best so that it is not overpowering.
Storage: You can store these muffins in an airtight container or resealable bag on the counter for up to 2 days or in the fridge for 4-5 days.To freeze, store muffins in an airtight container in the freezer for up to 1 month. Simply thaw at room temperature for about an hour when you are ready to eat them.