01 - Preheat oven to 350°F. Line a 12-cup muffin tin with paper liners or lightly grease with cooking spray.
02 - In a large bowl, whisk together whole wheat flour, protein powder, baking powder, baking soda, and salt until evenly distributed.
03 - In a separate bowl, whisk Greek yogurt, eggs, maple syrup, applesauce, milk, and vanilla extract until completely smooth and combined.
04 - Pour wet ingredients into dry ingredients. Fold gently with a spatula just until flour disappears. Stop mixing as soon as combined to avoid tough muffins.
05 - Gently fold blueberries into batter, reserving a handful to press onto tops before baking if desired.
06 - Divide batter evenly among the 12 muffin cups, filling each about three-quarters full.
07 - Bake for 18 to 20 minutes until tops are lightly golden and a toothpick inserted into the center comes out clean.
08 - Let muffins cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.