Peanut Butter Brownies

Here is how I made someone's brownie recipe the other day. I just made a couple of adjustments to it based on the reviews. Pretty tasty.

Ingredients
1/2 cup peanut butter
2 eggs
1 teaspoon vanilla extract
1 cup packed brown sugar
4 tablespoons butter, softened
2/3 cup all-purpose flour
1 teaspoon baking powder
2 tablespoons cocoa powder
1/4 teaspoon salt
1/2 cup chocolate chips

Directions
1.Preheat oven to 350 degrees F (150 degrees C). Grease an 8-inch square baking pan.
2.In a large mixing bowl, cream together the peanut butter and butter. Add the brown sugar, vanilla and eggs and beat until light and fluffy. Combine the flour, baking powder, cocoa, and salt in a separate bowl. Add to the butter mixture and mix until well blended. Stir in the chocolate chips.
3.Spread batter evenly into pan and bake for 25 to 30 minutes or until toothpick comes out clean. Let cool on wire rack and cut into 2-inch squares.

Next time, I think I might follow another recommendation and use more cocoa and less baking powder, and see how that works.