Make brownie. Preheat oven to 350° F. Spray Giant Dessert Shell pan with Bake Easy Non-Stick Spray.
In small saucepan, melt butter and brown sugar; stir until sugar is dissolved. Remove from heat and let cool about 5 minutes. In small bowl, combine flour, baking powder and salt. Stir in eggs and vanilla extract; mix well. Add flour mixture; mix until blended. Spread batter into prepared pan.
Bake 30 to 35 minutes or until toothpick inserted in center comes out clean. Cool in pan 10 minutes. Remove from pan; cool completely on grid.
Place on a foil-wrapped cake circle.