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Reeces Pieces chocolate chip cookie bars
Caroline

Reese’s Pieces Chocolate Chip Cookie Bars

Chewy, chocolatey dessert bars made with cake mix, chocolate chips, and Reese’s Pieces. Quick to prepare, kid-approved, and perfect for bake sales, holidays, or lunchbox treats.
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Prep Time 10 minutes
Cook Time 25 minutes
Total Time 35 minutes
Servings: 12 bars
Course: Bars, Cookies, Dessert
Cuisine: American
Calories: 310
Ingredients Equipment Method Notes

Ingredients
  

  • 1 box yellow cake mix
  • 1 stick melted butter
  • 1 tsp vanilla extract
  • 2 large eggs
  • 2 cups chocolate chips
  • 1 small box Reese’s Pieces

Equipment

  • large mixing bowl
  • spatula or wooden spoon
  • 9x13-inch baking pan
  • nonstick spray or butter

Method
 

  1. Set your oven to 350°F (175°C).
  2. In a large mixing bowl, combine cake mix, melted butter, vanilla, and eggs. Stir until smooth.
  3. Fold in the chocolate chips evenly.
  4. Grease a 9x13-inch baking pan or line with parchment paper.
  5. Press the mixture evenly into the pan.
  6. Sprinkle Reese’s Pieces over the batter and press lightly.
  7. Bake for 20–25 minutes, or until edges are golden and a toothpick comes out clean.
  8. Let cool in the pan before cutting into squares.

Notes

These bars are thick and chewy, so let them cool fully before slicing. Perfect for lunchboxes, bake sales, or holiday trays. Add extra Reese’s Pieces on top after baking for a brighter look.