Preheat your oven to 350°F (175°C) and line a muffin tin with paper liners or grease with cooking spray.

In a large mixing bowl, whisk together the oat flour, vanilla protein powder, baking powder, baking soda, cinnamon, and salt.

In a separate bowl, combine the unsweetened applesauce, plain Greek yogurt, egg, honey or maple syrup, vanilla extract, and almond milk, mixing until smooth.

Gently fold the wet ingredients into the dry mixture until just combined.

Spoon the batter into the muffin cups, filling each about two-thirds full.

Bake for 15-18 minutes or until golden brown, and a toothpick comes out clean.

Cool in the tin for 5 minutes, then transfer to a wire rack.