A plate full of the world's BEST peanut butter bars. Thick and chewy, with layers of smooth peanut butter and chocolate frosting.
Print Recipe
4.72 from 60 votes

World's Best Peanut Butter Bars

Perfectly thick, soft and chewy peanut butter bars with a peanut butter and chocolate glaze, and oats baked in the chewy cookie bars.
Prep Time15 mins
Cook Time20 mins
Total Time35 mins
Course: Dessert
Cuisine: American
Servings: 28
Calories: 202kcal
Author: Lauren Allen

Ingredients

For the bars:

  • 3/4 cup butter
  • 1/2 cup granulated sugar
  • 1 cup light brown sugar
  • 2 large eggs
  • 1/2 teaspoon vanilla extract
  • 1/2 cup creamy peanut butter (plus more for spreading over baked bars)
  • 2 1/2 teaspoons baking soda
  • 1/2 teaspoon salt
  • 1 1/2 cups all-purpose flour
  • 2 cups old-fashioned rolled oats

For the chocolate frosting:

  • 1/4 cup butter
  • 1 Tablespoon unsweetened cocoa powder
  • 1 1/2 Tablespoons milk
  • 1 1/4 cups powdered sugar
  • 1 teaspoon vanilla extract

Instructions

  • Preheat oven to 350 degrees F. In a large mixing bowl, cream together the butter, sugar and brown sugar. 
  • Add the eggs, vanilla, and peanut butter and mix well.
  • In a separate bowl mix together the dry ingredients. Add dry ingredients to creamy mixture. 
  • Press firmly into a greased 9x13'' pan. Bake at 350 degrees for 17-21 minutes. Do not over-bake! They will look just barely set in the center, and they will harden as they cool. Allow to cool completely.
  • Once cooled, spread a thin layer of peanut butter over the bars.

To make the chocolate frosting:

  • Add butter to a small skillet over medium heat. Once melted, stir in cocoa.
  • Remove from heat and add milk, powdered sugar and vanilla. Whisk until smooth, using electric beaters to get out any lumps, if needed. .
  • Spread chocolate frosting over the top of the bars.

Video

Nutrition

Calories: 202kcal | Carbohydrates: 26g | Protein: 3g | Fat: 9g | Saturated Fat: 4g | Cholesterol: 29mg | Sodium: 216mg | Potassium: 76mg | Fiber: 1g | Sugar: 17g | Vitamin A: 220IU | Calcium: 17mg | Iron: 0.8mg