Banana Muffins with Sour Cream

Step 1
Preheat the oven to 350 degrees F (175 degrees C). Grease 12 muffin cups or line with paper muffin liners.

Step 2
Mix together flour, baking powder, baking soda, and salt in a large bowl.

Step 3
Beat together banana, sugar, egg, and vanilla in a separate bowl. Stir in sour cream. Stir banana mixture into flour mixture until just combined. Scoop batter into the prepared muffin cups.

Step 4
Bake in the preheated oven until a toothpick inserted into the center of a muffin comes out clean, 15 to 20 minutes. Let cool before serving. For best flavor, place muffins in an airtight container or bag overnight.