Preheat oven to 350°F. Line standard muffin pan with baking cups. In medium bowl combine flour, baking soda, baking powder and salt. In large bowl, beat butter and sugar with electric mixer until light and fluffy. Add eggs; mix well. Add chocolate and vanilla; beat until well blended. Add dry ingredients in thirds alternating with buttermilk, beating after each addition until smooth. Spoon into baking cups. Bake 18-20 minutes or until toothpick inserted comes out clean. Cool cupcakes in pan on cooling rack for 5-8 minutes. Remove cupcakes from pan; cool completely.
Any of our cupcake recipes may be prepared in our Mini Tasty-Fill pans. Spray pans with vegetable pan spray, then fill each with about 1/2 cup batter. Place pans on cookie sheet and bake 14-16 minutes. Cool in pan on cooling grid for about 8 minutes; remove from pan and cool completely before filling and icing.