k0nane's "Sex" Peanut Butter Brownies

* 1 cup peanut butter
* 7 tbsp butter
* 1 cup white sugar
* 3/4 cup packed brown sugar
* 2 egg
* 3/4 teaspoon vanilla extract
* 1-1/4 cups all-purpose flour
* 1-1/2 teaspoons baking powder
* 1/4 teaspoon salt

1. Preheat oven to 350 degrees F (175 degrees C ). Grease a 9x12 inch baking pan.

2. In a medium bowl, cream together peanut butter and margarine.
3. Gradually blend in the brown sugar, white sugar, eggs, and vanilla; mix until relatively fluffy.
4. Combine flour, baking powder, and salt; stir into the peanut butter mixture until well blended.
5. Bake for 30 to 35 minutes in preheated oven, or until the top springs back when touched. Cool, and cut into squares.

Increased and slightly modified version of http://allrecipes.com/Recipe/chewy-peanut-butter-brownies/detail.aspx.