Peanut Butter Oatmeal Bars Recipe

A stack of Reese's bars with swirled chocolate and Reese’s chunks.

4.67 from 3 votes

Peanut Butter Oatmeal Bars Recipe

Thick, chewy Peanut Butter Oatmeal Bars combine classic flavors of chocolate and peanut butter with Reese’s chunks for a treat that’s impossible to resist.

Prep Time10

Cook Time22

Total Time32

Course: Brownies & Bars, Dessert

Cuisine: American

Diet: Vegetarian

Servings: bars

Calories: 379kcal

Author: Andrea

Ingredients

1 cup granulated sugar
1 cup brown sugar packed
1 cup peanut butter creamy or chunky
3/4 cup (1 1/2 sticks) butter room temperature
1 tsp vanilla
2 eggs
2 cups all-purpose flour
1 1/2 cups quick rolled oats
1 tsp baking soda
1/2 tsp salt

Peanut Butter Topping

1/2 cup peanut butter
2 cups powdered sugar
1/3 cup milk

1 cup chocolate chips (milk or semi-sweet)
5 Reese's peanut butter cups chopped

Instructions

Preheat oven to 350 degrees Fahrenheit (175 degrees Celsius). Lightly grease (or cover with parchment) a 9x13-inch baking pan, and set aside.
In the bowl of a stand mixer, cream the sugars, butter, and peanut butter for 1 minute. Turn the speed to low and add one egg at a time. Add vanilla and mix until combined.
In a medium-sized mixing bowl, whisk together the oats, flour, baking soda, and salt. With mixing speed on low, gradually add the dry ingredients until just combined.
Pour dough into the prepared pan and pat down until an even layer is formed. Place in the oven and bake for 22-28 minutes, or until the top begins to brown.
Meanwhile, in a medium-sized mixing bowl, combine all the topping ingredients. Using a hand mixer, beat until smooth (it should be a spreadable consistency but will melt and get shiny on contact). Set aside until needed.
Remove the bars from the oven and place the pan on a wire rack. Sprinkle chocolate chips over the top, then pour on the topping, swirl, and spread into an even layer. Top with chunks of peanut butter cups, pressing them into the topping. Allow to cool for 30 minutes (or refrigerate until the topping is solid) before cutting into bars.

Notes

-Bars should be stored in an airtight container for up to 5 days.

STORE leftover bars in an airtight container at room temperature for up to 3 days or in the fridge for up to a week. FREEZE in a single layer wrapped in plastic wrap and place in an airtight container or freezer bag for up to 3 months. Thaw overnight in the fridge before serving.

REHEAT bars in the microwave on a microwave-safe plate. Start with 10-15 seconds on medium power, checking frequently to avoid overheating or melting the topping. For a more even texture, reheat in the oven at 300°F (150°C) for 5-7 minutes. Cover with foil to prevent drying out the top.

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