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Part Cookie, Part Cake, Part Bar, It’s Basically A Trifecta Of Peanut Butter Goodness!

We’ve documented our love for peanut butter before (here and here), so it’s really no surprise that we’re coming at you today with another recipe that beautifully showcases our favorite nut butter.

This dessert is like a twist on an oatmeal cookie; part cookie, part cake, part bar, it’s basically a trifecta of peanut butter oat goodness that never ceases to satiate our sweet tooth. Depending on your level of peanut butter adoration you can add more or less to this and we promise it’ll still taste amazing– try it out!

For The Ultimate PB Lovers: Peanut Butter-Frosted Oatmeal Peanut Butter Bars

Peanut Butter Oatmeal Bars

Yield: 12-16 bars



  • 1 1/4 cup all-purpose flour
  • 1 cup old-fashioned oats (not quick-cooking)
  • 2/3 cup brown sugar
  • 2/3 cup peanut butter
  • 1/2 cup (1 stick) unsalted butter, room temperature
  • 1/3 cup sugar
  • 1 large egg
  • 1/2 teaspoon vanilla extract
  • 1/2 teaspoon baking soda


  • 1 1/2-2 cups powdered sugar
  • 1/2 cup (1 stick) unsalted butter, room temperature
  • 1/2 cup creamy peanut butter
  • 4 tablespoons milk
  • 1/2 teaspoon vanilla extract


  1. Preheat oven to 350º F and line a 9×13-inch baking dish with parchment paper.
  2. In a small bowl, whisk together flour, oatmeal and baking soda, and set aside.
  3. In a large bowl or mixer, cream together peanut butter, butter and sugars until fluffy and lightened in color. 3-4 minutes.
  4. Beat in egg and vanilla extract, then gradually mix in dry ingredients and stir until just combined.
  5. Press dough/batter into lined baking dish and even out into a smooth layer.
  6. Bake for 13-14 minutes, or until golden brown.
  7. Remove from oven and let cool completely.
  8. In a bowl or mixer, beat together butter, peanut butter and vanilla until combined, and smooth and creamy.
  9. Alternate adding powdered sugar and milk until mixture is fluffy and desired consistency is reached.
  10. Once bars have completely cooled, remove parchment lining from baking dish, cut into squares, frost liberally and enjoy!


Recipe adapted from The Girl Who Ate Everything

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