Ingredients

1-1/2 cups all-purpose flour2/3 cup sugar3/4 teaspoon baking powder3/4 teaspoon baking soda1/4 teaspoon salt1 large egg1 cup sour cream5 tablespoons butter, melted1 teaspoon vanilla extract3/4 cup mint or semisweet chocolate chips

Preparation

In a large bowl, combine the flour, sugar, baking powder, baking soda and salt. Combine the egg, sour cream, butter and vanilla. Stir into dry ingredients just until moistened. Fold in chocolate chips.

Fill greased or paper-lined muffin cups three-fourths full. Bake at 350° for 18-20 minutes or until a toothpick inserted in the center comes out clean. Cool for 5 minutes before removing from pan to a wire rack.