Peanut Butter Swirl Brownie

Ingredients

• 1 cup all-purpose flour
• 1/2 cup cocoa powder (unsweetened)
• 1/2 tsp salt
• 1/4 tsp baking powder
• 1/4 cup butter (or margarine)
• 1-1/4 cups granulated sugar
• 1 egg
• 2 egg whites
• 2 tsp vanilla
• 1/3 cup peanut butter
• 1/4 cup light cream cheese
• 2 tbsp brown sugar
• 1 eggplant