Ingredients Original recipe yields 36 servings Ingredient Checklist ¾ cup butter, softened ½ cup white sugar ½ cup firmly packed brown sugar 1 egg 1 teaspoon vanilla extract, or more to taste 1 cup peanut butter 1 ¾ cups unbleached flour ¾ teaspoon baking soda 10 ounces chocolate chunks (such as Ghirardelli® Bittersweet Chocolate) Directions Instructions Checklist 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 13×9-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.
