In a large bowl, cream butter and sugar until light and fluffy. Beat in eggs and vanilla. Combine the flour, cocoa, baking powder and salt; gradually add to the creamed mixture and mix well.

Fill paper, or foil-lined muffin cups two-thirds full. Place a chocolate kiss, tip end down, in the center of each.

Bake at 350° for 20-25 minutes or until top of brownie springs back when lightly touched.