Preheat oven to 350°. In a large bowl, cream butter and brown sugar until fluffy. Beat in eggs and vanilla. In another bowl, whisk flour, baking powder, spices and salt; gradually beat into creamed mixture.
Spread into a greased 9-in.-square baking pan.
Mix topping ingredients; sprinkle over top. Bake 35-40 minutes or until set and golden brown. Cool in pan on a wire rack. Cut into bars.
Notes
Recipe By: Taste of Home
Serving Size: 20
Yield: 1 1/2 dozen