1 cup butter
2 cups brown sugar
1 teaspoon vanilla extract
1/2 cup cocoa powder
1 1/2 cups all-purpose flour
1/2 teaspoon baking powder
1/2 teaspoon salt
1/2 cup chocolate chips
Preheat oven to 350 degrees F.
Melt the butter and add sugar. Keep on heat until sugar no long feels grainy and is incorporated into the butter.
One at a time, mix in the eggs. Make sure you mix them in right away because if they sit on the warm butter & sugar mixture they can turn into scrambled eggs.
Add the vanilla.
Mix in the cocoa, flour, baking powder and salt.
Pour batter into a greased 9 x 13 inch pan.
Sprinkle chocolate chips on top.
Bake for 20 to 25 minutes.
Variations: instead of chocolate chips you can use nuts or any other kind of chips (butterscotch, white chocolate, peanut butter chips, skor bits, etc.).