In large bowl, combine flour, brown sugar, granulated sugar, baking powder and salt; mix well. In small microwave-safe bowl, melt butter; cool slightly. Add eggs and vanilla to butter; whisk until smooth. Add butter mixture to dry ingredients; mix well to form stiff dough. Mix in chocolate morsels. Roll out dough on generously-floured surface to 1/4 inch thickness. Cut 5-inch round disks from dough. Drape one disk over each cup mold of pan, pressing to form smooth surface.