Preheat oven to 350 degrees Fahrenheit. Line a 12-cup muffin pan with muffin liners or grease with coconut oil.

Add oat flour, baking powder, baking soda, salt, cocoa powder, and chocolate protein powder to a large bowl or blender. Stir or blend on high until fully combined.

Add almond milk, maple syrup, apple cider vinegar, coconut yogurt, and vanilla. Stir or blend until fully incorporated and smooth.

Scoop muffin mixture evenly into prepared muffin tins.

Bake in preheated oven for 20-23 minutes, or until a toothpick inserted comes out clean.

Allow muffins to cool. Drizzle with almond butter or peanut butter if desired, and enjoy!