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Ultimate Chewy M&M Christmas Cookie Bars with Cream Cheese Frosting

A thick, square slice of rich christmas cookie bars topped with white frosting and colorful M&M candies.

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Make these festive and chewy Christmas cookie bars loaded with M&Ms and topped with a simple cream cheese frosting. They are perfect for holiday parties and cookie exchanges.

Ingredients

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  • 1 cup unsalted butter, softened
  • 1 cup granulated sugar
  • 1/2 cup packed light brown 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 M&M’s candies
  • 1 cup semi-sweet chocolate chips
  • For the Frosting: 4 ounces cream cheese, softened
  • 1/4 cup unsalted butter, softened
  • 2 cups powdered sugar
  • 1 teaspoon vanilla extract
  • 1 tablespoon milk

Instructions

  1. Preheat your oven to 350°F (175°C). Line a 9×13 inch baking pan with parchment paper, leaving an overhang for easy removal.
  2. In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.
  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. Fold in the M&M’s candies and chocolate chips.
  6. Press the dough evenly into the prepared 9×13 inch pan.
  7. Bake for 22 to 25 minutes, or until the edges are lightly golden and the center is mostly set. You want these Christmas cookie bars to remain chewy.
  8. Let the bars cool completely in the pan on a wire rack.
  9. Prepare the cream cheese frosting: Beat the softened cream cheese and butter together until smooth.
  10. Gradually beat in the powdered sugar until incorporated. Add the vanilla extract and milk, beating until the frosting is light and spreadable.
  11. Spread the cream cheese frosting evenly over the cooled cookie bars.
  12. Chill the bars for at least 30 minutes before cutting into squares for clean slices.

Notes

  • For extra festive color, use only red and green M&M’s for your holiday baking.
  • If you prefer a richer bar, substitute half of the flour with cake flour for a softer texture.
  • These festive bar cookies freeze well; layer them with parchment paper before placing them in an airtight container.

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