Classic Peanut Butter Cookie Bars with Frosting

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    • 1 cup unsalted butter, melted 🧈

 

  • 1 cup creamy peanut butter 🥜
  • 1 cup granulated sugar
  • 1 cup packed light brown sugar
  • 2 large eggs 🥚
  • 2 tsp vanilla extract
  • 2 cups all purpose flour
  • 1 tsp baking powder
  • ½ tsp salt

For the Frosting

  • ½ cup creamy peanut butter
  • ¼ cup unsalted butter, softened
  • 2 cups powdered sugar
  • ¼ cup milk (adjust for consistency)
  • 1 tsp vanilla extract

Tools You’ll Need

  • Mixing bowls
  • Hand mixer or whisk
  • 9×13-inch baking pan
  • Rubber spatula or offset spatula
  • Cooling rack

Before You Start

  • Prep the pan: Lightly grease or line with parchment for easy lifting.
  • Soften the frosting butter: Let it sit out while the bars bake.
  • Room temp eggs: This helps everything blend better and gives the bars more lift.

Step by Step: How to Make Peanut Butter Cookie Bars

1: Mix the Wet Ingredients

    • In a large bowl, whisk together the melted butter and peanut butter until smooth.

 

  • Add in both sugars and mix well until fully combined.
  • Crack in the eggs, add vanilla extract, and continue whisking until the mixture is light and creamy.

2: Add the Dry Ingredients