Preheat oven to 350°F. Spray pan with vegetable pan spray or line with baking cups. In medium bowl, beat butter and sugar with electric mixer until light and fluffy. Add eggs, one at a time, and vanilla; mix well. Combine flour and baking powder. Alternately add flour mixture and milk, mixing well after each addition. Fold in raspberries. Spoon batter into prepared pan. Bake 20-25 minutes or until toothpick inserted comes out clean. Cool 10 minutes in pan on rack; remove and cool completely before decorating.