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Ultimate Chewy M&M Christmas Cookie Bars

Close-up of a chewy, thick christmas cookie bars square topped with red and green M&Ms and chocolate chips.
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Make these ultimate chewy M&M Christmas cookie bars for a festive, easy holiday treat perfect for cookie exchanges or dessert tables. This recipe delivers soft, colorful bars everyone will love.

Ingredients

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  • 1 cup (2 sticks) unsalted butter, softened
  • 3/4 cup granulated sugar
  • 3/4 cup packed light brown sugar
  • 2 large eggs
  • 1 tablespoon vanilla extract
  • 2 1/4 cups all-purpose flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 cup semi-sweet chocolate chips
  • 1 cup M&M’s Holiday Baking Candies
  • 1/2 cup white chocolate chips (optional)

Instructions

  1. Preheat your oven to 350°F (175°C). Line a 9×13 inch baking pan with parchment paper, leaving an overhang on the sides for easy removal. Lightly grease the paper.
  2. In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until the mixture is light and fluffy. This takes about 3 minutes with an electric mixer.
  3. Beat in the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
  4. In a separate medium bowl, whisk together the flour, baking soda, and salt.
  5. Gradually add the dry ingredients to the wet ingredients, mixing on low speed until just combined. Do not overmix the dough.
  6. Gently fold in the semi-sweet chocolate chips, M&M’s, and white chocolate chips, if using.
  7. Press the cookie bar dough evenly into the prepared 9×13 inch pan.
  8. Bake for 22 to 26 minutes, or until the edges are lightly golden brown and the center is set but still looks slightly soft. For the chewiest bars, err on the side of slightly underbaking.
  9. Let the bars cool completely in the pan on a wire rack before lifting them out using the parchment paper overhang.
  10. Once cool, cut into squares. These are the best Christmas cookie bars when served slightly warm or at room temperature.

Notes

  • For extra gooey Christmas cookie bars, slightly reduce the baking time by 1-2 minutes.
  • If you want a frosted version, use this recipe as the base and top with your favorite cream cheese frosting once completely cool.
  • Store leftovers in an airtight container at room temperature for up to 4 days.

Nutrition

Find it online: https://hearthbite.com/christmas-cookie-bars/