01 -
Preheat oven to 375ºF. Lightly grease the muffin tin to prevent sticking or use muffin liners.
02 -
Mix the sugar, egg, oil, milk, and vanilla in a bowl until well combined.
03 -
Add the flour, baking powder, and salt to the wet ingredients. Stir until evenly combined, but do not over-mix.
04 -
Gently stir in the sour cream until fully blended. Fold in the blueberries, reserving a few for topping if desired.
05 -
Distribute the batter evenly into the muffin tin. Fill to the top for tall muffins or 2/3 full for standard muffins. Add reserved blueberries and sprinkle with sugar if desired.
06 -
Bake muffins for approximately 25 minutes, or until a toothpick inserted into the center comes out clean. Adjust baking time for larger or smaller muffins or if using frozen blueberries.
07 -
Place baked muffins in a sealed container while still warm to retain moisture, if not consumed immediately.