Prep Time::30 mins
Cook Time::30 mins
Additional Time::30 mins
Total Time:: 1 hr 30 mins
Servings::24
Yield::24 squares
Ingredients
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3 ½ cups all-purpose flour
2 ¼ teaspoons baking powder
¾ teaspoon salt
¾ cup butter, softened
1 ½ cups packed brown sugar
¾ cup white sugar
3 eggs
1 egg yolk
2 teaspoons vanilla extract
6 tablespoons peanut butter
2 cups semisweet chocolate chips
½ cup butter, softened
1 cup peanut butter
3 cups confectioners' sugar
⅓ cup milk
Directions
Preheat oven to 350 degrees F (175 degrees C). Grease a 9×13 inch baking dish. Sift together the flour, baking powder and salt; set aside.
In a large bowl, cream together 3/4 cup of butter, brown sugar and white sugar until light and fluffy. Beat in the eggs and yolk one at a time, then stir in the vanilla and 6 tablespoons peanut butter. Blend in the sifted ingredients and stir in the chocolate chips. Press the mixture evenly into the prepared pan.
Bake in the preheated oven for 25 to 30 minutes, or until a toothpick inserted into the center comes out with moist crumbs. Cool completely before frosting.
To make the frosting, mix the remaining 1/2 cup of butter and 1 cup peanut butter together in a medium bowl. Mix in the confectioners sugar until smooth, then gradually stir in milk until a spreadable consistency is reached. Cut, serve and enjoy!