01 - Preheat your oven to 350°F. Line a 12-cup muffin tin with paper liners or lightly grease it.
02 - In a medium bowl, whisk together the flour, protein powder, baking powder, baking soda, and salt until well blended.
03 - In a large bowl, whisk together Greek yogurt, eggs, milk, oil, sugar, and vanilla extract until smooth and creamy.
04 - Add the dry ingredients to the wet mixture and stir gently until just combined. Be careful not to overmix as this can result in dense muffins.
05 - Toss the blueberries with 1 tablespoon of flour in a small bowl to prevent them from sinking during baking.
06 - Gently fold the flour-coated blueberries into the batter using a spatula, being careful not to crush the berries.
07 - Divide the batter evenly among the muffin cups, filling each about 3/4 full.
08 - Bake for 18 to 22 minutes, or until a toothpick inserted in the center of a muffin comes out clean.
09 - Allow muffins to cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.