gooey brownies

1 can sweetened condensed milk
1/4 c. cocoa powder
1 egg
2 Tbs. vanilla
1/2 tsp baking powder
1/2 c. chopped walnuts or pecans (optional  - add 1/4 c. cocoa powder if you use nuts)

heat oven to 350 - spray nonstick cooking oil in a square pan. combine all ingredients & pour batter into pan. Cook in oven for 20-25 minutes. Cool for 10-15 minutes & serve.