Prep your pan: Heat the oven to 350°F (175°C). Line a 12-cup muffin tin with paper liners or grease lightly.
Make oat flour (if needed): Pulse gluten free oats in a blender until they resemble flour.
You’ll need about 1 cup of oat flour.
Whisk dry ingredients: In a large bowl, combine 1 cup almond flour, 1 cup oat flour, 1/2 cup gluten free all-purpose flour (optional but helpful), 1 1/2 teaspoons baking powder, 1/2 teaspoon baking soda, 1 teaspoon cinnamon, and 1/2 teaspoon salt.
Mix wet ingredients: In a separate bowl, whisk 2 large eggs, 1 cup mashed ripe banana, 1/2 cup Greek yogurt, 1/3 cup maple syrup, 1/4 cup oil, 1 teaspoon vanilla, and 1/4 cup milk until smooth.
Combine gently: Pour wet into dry and stir with a spatula just until no dry streaks remain. The batter should be thick but scoopable. If very stiff, add a splash more milk.
Fold in extras: Stir in 1 cup blueberries, 1/2 cup chocolate chips, or 1/2 cup chopped nuts.
Don’t overmix.
Portion the batter: Divide evenly among the muffin cups, filling each about 3/4 full. For a nice dome, rest the filled pan for 5 minutes before baking.
Bake: Bake 18–22 minutes, or until the tops are set and a toothpick comes out with a few moist crumbs.
Cool: Let muffins cool in the pan 5 minutes, then move to a rack to cool completely. This helps them set and prevents soggy bottoms.
Enjoy: Serve warm or at room temperature.
Add a smear of nut butter for extra protein.