Easy Sourdough Discard Blueberry Muffins

• porcijos: 4 servings
• aktyvus laikas: 15 minutes
• bendras laikas: 55 minutes

Ingredientai

2 cups all-purpose flour

1 cup white sugar

2 teaspoons baking powder

1/2 teaspoon baking soda

1/2 teaspoon salt

1 tablespoon cornstarch

Zest from half a lemon

1 cup blueberries (fresh or frozen)

8 tablespoons melted butter

2 large eggs

1/2 cup leftover sourdough starter

3 tablespoons sour cream (or plain greek yogurt)

1 teaspoon vanilla essence

For topping:

3 tablespoons melted butter

1/2 cup white sugar

1/2 cup all-purpose flour