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Export 7 ingredients for grocery delivery
Step 1
Preheat oven to 375 degrees F (190 degrees C).
Step 2
Beat butter, white sugar, and brown sugar together with an electric mixer in a large bowl until light and fluffy. Beat egg and vanilla extract into the butter mixture. Add peanut butter and beat until incorporated.
Step 3
Sift flour and baking soda together in a separate bowl; mix into the butter mixture. Fold chocolate chunks into the mixture.
Step 4
Spread the batter into a 13x9-inch baking dish.
Step 5
Bake in the preheated oven until a toothpick inserted into the center comes out clean, 20 to 25 minutes. Cool completely before cutting into squares.