Preheat oven to 350°F and line muffin tin with parchment liners.

In one bowl combine almond flour, coconut flour, baking soda, and salt.

In a separate bowl combine egg, melted coconut oil or grass-fed butter, honey, and mashed banana and mix well.

Combine wet and dry ingredients. Fold in blueberries and raspberries if using.

Bake for about 20-25 minutes or until a toothpick comes out clean.