Step 1

Preheat the oven to 400 degrees F (200 degrees C). Grease a 12-cup muffin tin or line with paper liners.

Step 2

Mix yogurt, butter, egg, egg white, lemon zest, and lemon juice together in a medium bowl.

Step 3

Mix flour, protein powder, sugar, baking soda, and salt together in a large bowl. Add wet ingredients to the flour mixture and stir to combine; mixture will be very thick. Stir in almond milk until mixture is smooth. Gently stir in fresh blueberries. Dollop batter evenly into the prepared muffin tin.

Step 4

Bake in the preheated oven until tops are golden brown and a toothpick inserted in the middle comes out clean, 25 to 30 minutes.