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Peanut Butter Bars

Deliciously sweet, chocolatey, salty peanut buttery, chewy oat, and creamy frosting BARS!

  • Total Time: 2 hours
  • Yield: 6 1x


Units Scale


  • 3/4 cups butter, softened but not melted
  • 3/4 cups sugar
  • 3/4 cups peanut butter (smooth or crunchy depending of preference)*
  • 2 eggs, at room temperature
  • 2 tsp vanilla extract
  • 1 1/2 cups of flour
  • 1/2 tsp salt
  • 3/4 tsp baking soda
  • 1 1/2 cups rolled oats


  • 1 cup of of semi sweet chocolate chips


  • 1 cup powdered sugar
  • 3/4 cup smooth peanut butter
  • 3/4 cup butter, softened
  • 1 tsp vanilla extract
  • 1/4 cup of milk


Cookie layer:

  1. Preheat oven to 375 degrees F
  2. Grease a 12×17 in cookie sheet pan
  3. Wet ingredients: In a large mixing bowl cream together (using hand or stand mixer): butter, sugar, peanut butter, eggs and vanilla until fluffy
  4. Dry ingredients: Sift in flour, salt, baking soda to the creamed mixture
  5. Add oats
  6. Mix together until combined (cookie dough texture)
  7. Press the dough onto the prepared baking pan sheet until it forms a uniform layer on the bottom of the pan
  8. Bake at 375 F for about 10 minutes until slightly golden on top
  9. Turn off the oven


Chocolate layer:

  1. Sprinkle the chocolate chips on top of the cookie layer and place back in the warm oven (that is turned OFF) for 2 minutes
  2. Take out the cookie sheet and spread the warm chocolate all over the cookie with a spatula or knife- creating a smooth even layer
  3. Place in fridge to let chocolate layer harden a bit


Peanut Butter Frosting layer:

  1. In a medium mixing bowl cream together (using hand or stand mixer) the powdered sugar, peanut butter, butter, vanilla and milk
  2. The end result should be a uniform creamy frosting
  3. With a spatula gently spread the frosting over the chocolate layer


Final step:

  1. Let the bars harden in the fridge for about an hour before cutting
  2. Keep in fridge (2 weeks) or freezer (3 months)


if you use organic no-stir peanut butter the oat cookie layer will be more dry and less chewy (I personally like them that way). This is because there aren’t added oils or binders that make it more oily and therefore, add moisture. If you use regular peanut butter (think Jiffy) they will be more chewy and dense (I love this way too).

  • Author: Elena
  • Prep Time: 30 minutes
  • Cook Time: 1 hour 30 minutes
  • Category: Dessert