Peanut Butter Cookie Bars are topped with peanut butter chocolate and marshmallows. Easy to make.

Peanut Butter Cookie Bars Recipe


Peanut Butter Cookie Bars has rich crunchy peanut butter cookie layer topped with peanut butter-flavored chocolate and marshmallows. What’s not to love? These bar cookies are fast and easy to make, taking a little more than half an hour. Highly-rated by taste-testers and sure to be a hit with your family.

Peanut Butter Cookie Bars Recipe

1/2 cup (8 Tablespoons or 1 stick) butter, at room temperature
1/2 cup butter-flavored shortening
1/3 cup peanut butter
1 large egg
1 teaspoon pure vanilla extract
1-1/4 cups brown sugar, firmly packed
2-1/4 cups all-purpose flour
1/2 teaspoon table salt
1/3 cup chopped peanuts, divided use (see Note)

1-1/2 cups semi-sweet chocolate chips
1/4 cup peanut butter
1-1/2 cups miniature marshmallows

Preheat oven to 350 F. Line a 9 x 13-inch pan with non-stick foil.

In a large bowl, cream butter, shortening, peanut butter, egg, and vanilla. Beat in brown sugar. Add flour and salt, beating until combined. By hand, stir in two-thirds of the 1/3 cup chopped peanuts, reserving the remainder for the topping. Batter will be thick.

Press peanut butter cookie dough into an even layer in the prepared pan.

Bake 15 to 20 minutes, until lightly browned. Do not overcook. Let cool to room temperature, then prepare the topping.

• You Might Also Like: Peanut Butter Rollo Cups Recipe

For the Topping:
Heat the peanut butter in the top of a double-boiler until warm. Add the chocolate chips, stirring until melted, then stir in the remaining chopped peanuts. (Alternatively, the chocolate and peanut butter may be melted slowly in the microwave, checking and stirring every 30 seconds. Take care not to scorch the chocolate or it will seize up and get hard.)

Remove from heat and let cool slightly, then spread on top of cookie layer. Sprinkle with marshmallows, pressing them gently into the chocolate so they stick. Refrigerate about 20 minutes to set chocolate.

Cut and serve peanut butter cookie bars at room temperature.

Yield: 36 to 48 servings, depending on cut size

• If you don’t want to buy a full can of peanuts just for this recipe, pick up a single serving snack package of peanuts, usually sold near the check-out counters of grocery stores and convenience stores.

Peanut Butter Cookie Bars Recipe Photo ©2023 Peggy Filippone

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