Lemon Cream Cupcakes

INGREDIENTS:
1 cup butter, softened
2 cups sugar
3 eggs
2 teaspoons grated lemon peel
1 teaspoon vanilla extract
3-1/2 cups all-purpose flour
1 teaspoon baking soda
1/2 teaspoon baking powder
1/2 teaspoon salt
2 cups (16 ounces) sour cream
FROSTING:
3 tablespoons butter, softened
2-1/4 cups confectioners' sugar
2 tablespoons lemon juice
3/4 teaspoon vanilla extract
1/4 teaspoon grated lemon peel
1 to 2 tablespoons milk
Directions:
In a large bowl, cream butter and sugar until light and fluffy. Add eggs, one at a time, beating well after each addition. Beat in lemon peel and vanilla. Combine the flour, baking soda, baking powder and salt; add to creamed mixture alternately with sour cream, beating well after each addition (batter will be thick).

Fill greased or paper-lined muffin cups with 1/4 cup of batter. Bake at 350° for 25-30 minutes or until a toothpick inserted near the center comes out clean. Cool for 1 minutes before removing from pans to wire racks to cool completely.

For frosting, cream butter and confectioners' sugar in a small bowl until light and fluffy. Add the lemon juice, vanilla, lemon peel and milk; beat until smooth. Frost