Batman Cake

Directions

1. 1
   Preheat oven to 350.
2. 2
   Mix brown sugar and margarine together. Add granulated sugar, eggs, flour, and vanilla.
3. 3
   Mix together thoroughly.
4. 4
   Pour into a 9 X 12 X 2 greased pan.
5. 5
   Bake at 350 for 40 minutes.
6. 6
   Let cool, cut into squares, roll in powdered sugar.