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 mixing bowl, whisk together the whole wheat flour, protein powder, baking powder, baking soda, and salt until thoroughly blended.
03 - In a separate bowl, whisk the Greek yogurt, eggs, maple syrup, applesauce, milk, and vanilla extract until smooth and well combined.
04 - Pour the wet mixture into the dry ingredients. Fold gently with a spatula until just combined—avoid overmixing to prevent tough muffins.
05 - Gently fold in the blueberries, reserving a few to press on top of each muffin before baking for visual appeal.
06 - Divide batter evenly among the 12 prepared muffin cups, filling each about three-quarters full.
07 - Bake for 18–20 minutes, or until a toothpick inserted into the center comes out clean and the tops are lightly golden.
08 - Let muffins cool in the pan for 5 minutes, then transfer to a wire rack to cool completely before storing or serving.