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Reese’s Cake Mix Cookie Bars Recipe

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4.1 from 74 reviews

These Reese’s Cake Mix Cookie Bars are an easy, delicious treat combining the simplicity of a yellow cake mix with the rich flavors of Reese’s Pieces and Reese’s Peanut Butter Cups, baked into soft, chewy bars perfect for any occasion.

Ingredients

Cookie Bars

  • 1 box yellow cake mix
  • 2 large eggs
  • 1/2 cup butter, melted
  • 1 cup Reese’s Pieces
  • 1 cup Reese’s Peanut Butter Cups, chopped

Instructions

  1. Preheat Oven: Preheat your oven to 350 degrees Fahrenheit. Prepare a 9×13-inch baking pan by spraying it with nonstick spray or lining it with parchment paper to prevent sticking.
  2. Mix Ingredients: In a large mixing bowl, combine the yellow cake mix, eggs, melted butter, Reese’s Pieces, and chopped Reese’s Peanut Butter Cups. Mix thoroughly until all ingredients are well incorporated and the batter is uniform.
  3. Spread Batter: Evenly spread the cookie bar batter into the prepared 9×13 pan, smoothing the top to ensure even baking.
  4. Bake: Bake the bars for 20 to 25 minutes, or until the edges start to turn a golden brown color, indicating they are done. Avoid overbaking to keep the bars soft and chewy.
  5. Add Toppings (Optional): If desired, sprinkle extra Reese’s Pieces or chopped Peanut Butter Cups over the bars immediately after removing them from the oven while still warm, so they stick to the surface.
  6. Cool: Allow the bars to cool completely in the pan before cutting and removing. This helps them set and hold their shape when sliced.

Notes

  • For easier cleanup and removal, lining the baking pan with parchment paper is recommended.
  • Be careful not to overbake; the bars should remain soft and chewy in the center.
  • You can substitute the yellow cake mix with a gluten-free cake mix if needed for dietary preferences.
  • Adding extra Reese’s candies on top right after baking enhances the presentation and flavor.
  • Store these bars in an airtight container at room temperature for up to 3 days or refrigerate for longer freshness.