Whisk all of the ingredients together. (No mixer needed.)
Gently fold the blueberries into the batter.
Scoop the batter into a muffin tin lined with paper liners.
Top with Sugar
Finish each muffin with a sprinkling of sugar.
Bake 20-25 mins.
Bake at 375 degrees for 20-25 minutes.
Blueberry Sour Cream Muffins
Instant Pot Oatmeal