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5 from 1 vote

Peanut Butter Bars

Chewy peanut butter bars with fudgy chocolate frosting, just like the lunch lady made, but better! Easy, nostalgic, and totally addictive.
Prep Time20 minutes
Cook Time15 minutes
Total Time35 minutes
Course: Dessert
Cuisine: American
Keyword: lunch lady bars, peanut butter bars, peanut butter bars recipe
Servings: 24 Bars
Author: Alyssa Rivers

Ingredients

Peanut Butter Bars

  • 1 cup brown sugar
  • 1 cup granulated sugar
  • 1 cup unsalted butter
  • 1 cup creamy peanut butter
  • 2 large eggs
  • 1 teaspoon salt
  • 1 teaspoon baking soda
  • 2 cups rolled oats
  • 2 cups all-purpose flour

Peanut Butter & Frosting

  • ½ cup unsalted butter
  • 3 tablespoons unsweetened cocoa powder
  • 3 ½ cups powdered sugar
  • 1 teaspoon vanilla extract
  • 6 tablespoons milk
  • 1 cup creamy peanut butter for spreading

Instructions

Peanut Butter Bars

  • Preheat the oven to 350 degrees Fahrenheit. In a large bowl, cream together the 1 cup brown sugar , 1 cup granulated sugar, 1 cup unsalted butter, and 1 cup creamy peanut butter using an electric hand mixer.
  • Add in 2 large eggs, 1 teaspoon salt, 1 teaspoon baking soda, 2 cups rolled oats, and 2 cups all-purpose flour. Mix until combined.
  • Spread the mixture into a 15 X 9 X 2-inch baking sheet pan. Bake for 15 minutes, then cool completely before frosting.

Peanut Butter & Frosting

  • After cooling, spread 1 cup creamy peanut butter on top of the bars. Soften the peanut butter in the microwave for 30 seconds so it spreads easier.
  • For the frosting, melt ½ cup unsalted butter in a medium saucepan over medium heat. Add 3 tablespoons unsweetened cocoa powder and whisk to combine.
  • Remove from the heat and add 3 ½ cups powdered sugar, 1 teaspoon vanilla extract, and 6 tablespoons milk. Whisk together until really well until the frosting is silky and smooth.
  • Pour the frosting over the peanut butter layer and spread it evenly on top. Allow the frosting to set for a few minutes before cutting and enjoying!

Video

Notes

To store leftover Peanut Butter Bars, let them cool completely, then place them in an airtight container in the fridge. They can be stored for 3-4 days. They can be served chilled, or you can bring them to room temperature before serving.

Nutrition

Calories: 439kcal | Carbohydrates: 53g | Protein: 8g | Fat: 24g | Saturated Fat: 10g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 9g | Trans Fat: 0.5g | Cholesterol: 46mg | Sodium: 247mg | Potassium: 194mg | Fiber: 2g | Sugar: 37g | Vitamin A: 383IU | Calcium: 35mg | Iron: 1mg

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