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Chewy Christmas M&M Cookie Bars

A single square of chewy christmas cookie bars topped with red and green M&Ms and holiday sprinkles.

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Make these easy, one-pan Christmas cookie bars loaded with festive M&Ms and sprinkles. They deliver a soft, chewy texture perfect for holiday gatherings.

Ingredients

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  • 1 cup unsalted butter, softened
  • 1 cup packed brown sugar
  • 1/2 cup granulated sugar
  • 2 large eggs
  • 1 tablespoon vanilla extract
  • 2 3/4 cups all-purpose flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 1/2 cups Christmas M&Ms (red and green)
  • 1 cup holiday sprinkles
  • 1/2 cup white chocolate chips

Instructions

  1. Preheat your oven to 350 degrees F. Line a 9×13 inch baking pan with parchment paper, leaving an overhang on the sides for easy removal.
  2. In a large bowl, beat the softened butter, brown sugar, and granulated sugar together until the mixture is creamy.
  3. Beat in the eggs one at a time, then mix in the vanilla extract.
  4. In a separate bowl, whisk together the flour, baking soda, and salt. Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Do not overmix.
  5. Gently fold in the Christmas M&Ms, holiday sprinkles, and white chocolate chips.
  6. Press the dough evenly into the prepared baking pan.
  7. Bake for 22 to 25 minutes, or until the edges are lightly golden brown and the center is set. The bars should still look slightly soft for a chewy texture.
  8. Let the bars cool completely in the pan on a wire rack before lifting them out using the parchment paper overhang.
  9. Once cool, slice into squares. These are great make ahead Christmas treats.

Notes

  • For extra festive color, reserve a small handful of M&Ms and sprinkles to press onto the top of the dough before baking.
  • If you prefer thicker bars, use a 9×9 inch pan instead, but reduce the baking time slightly and watch them closely.
  • These bars freeze well; wrap cooled, uncut bars tightly before freezing for up to three months.

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