Preheat your oven to 350°F (175°C) and line a muffin tin with paper liners or lightly grease it.
In a large mixing bowl, whisk together the flour, protein powder, baking powder, and salt until well combined and no lumps remain.
In a smaller bowl, mix the plant-based milk, maple syrup, melted oil, and vanilla extract until smooth and evenly blended.
Pour the wet mixture into the dry ingredients and gently fold with a spatula until just combined; be careful not to overmix, as this keeps the muffins tender.
Gently fold in the blueberries, distributing them evenly throughout the batter and encouraging some to stay whole for a juicy burst in each bite.
Spoon the batter into the prepared muffin cups, filling each about three-quarters full; this helps give the muffins a nice domed top.
Place the muffin tin in the oven and bake for approximately 20 minutes, or until the muffins are golden brown on top and a toothpick inserted in the center comes out clean.
Once baked, remove the muffins from the oven and let them cool in the tin for about 5 minutes to allow the texture to set.
Transfer the muffins to a wire rack to cool completely, or enjoy them slightly warm for the best juicy blueberry bites.
Serve with additional fresh blueberries or a dollop of plant-based yogurt for extra flavor, if desired. Enjoy your wholesome, protein-packed muffins!