There are a lot of names for this dessert. PB Bars, Buckeye Bars, Bucky Bars, Hardy Bars, No-Bake Bars, Lunch Lady Bars and on and on. I think I must have at least two recipes for bars similar to this listed on my website but these may be my favorites! Some people top these with chocolate frosting, which is delicious too but I would rather top them with melted chocolate!
1 stick unsalted butter, melted
1 3/4 cups powdered sugar
1 1/2 cups light brown sugar, lightly packed
1 1/2 cups smooth peanut butter
2 cups semi-sweet chocolate chips
1 tablespoon solid vegetable shortening
Line a 9×9-inch square baking pan with aluminum foil. Lightly spray with non-stick cooking spray.
In a large bowl combine the melted unsalted butter, powdered sugar and lightly packed light brown sugar until mixed and well combined. You may need to add about 2 tablespoons milk or water.
Beat in the smooth peanut butter.
Place the mixture into the prepared pan and pat out evenly with clean hands.
In a medium sized microwave safe bowl combine the semi-sweet chocolate chips with the solid vegetable shortening. Microwave on high for 2 minutes, stirring every 30 seconds, until melted and smooth.
Pour the mixture over the peanut butter base and smooth out the top.
Chill, uncovered, in the refrigerator for about 2 hours.
Remove, lift from pan using sides of aluminum foil and cut into desired number of pieces. Chocolate sets hard so jagged pieces are not only desired but necessary.
Serve and store at room temperature.