Christmas Bar Cookies

5 from 55 votes

These Christmas bar cookies will be guaranteed family favorites with their soft, chewy texture and bright festive colors.

Prep Time10

Cook Time20

Total Time30

Course: Dessert

Cuisine: American

Keyword: Christmas Cookie Bars Recipe

Servings:

Calories: 360kcal

Preheat the oven to 350°F. Brush an 8×8-inch square baking pan with a bit of the melted butter and line the pan with parchment paper, leaving a 2-inch overhang on two sides.
In a large bowl, whisk the remaining butter and sugars until smooth. Whisk in egg and vanilla until fully incorporated.
Add flour and salt and mix just until moistened (do not over-mix).
Fold in ½ cup chocolate chips, ⅓ cup of the M&Ms, and jimmies.
Transfer batter to prepared pan and smooth the top with a rubber spatula. Sprinkle the top with the remaining M&M’s.
Bake for 20 minutes or until the top is golden brown and a toothpick inserted into the center comes out clean.
Set the pan on a wire rack and sprinkle with additional sprinkles, as desired. Cool completely. Using the parchment overhang, lift the blondies from the pan and transfer them to a cutting board. Cut into squares.

These cookie bars freeze well. Make a double batch and keep them in the freezer for a homemade holiday gift during the festive season.
Adding the overhanging parchment paper will allow you to lift the bars out of the pan for easy transfer to a cutting board so you can slice the bars.
Stir the batter together gently to keep the cookies soft and chewy; overmixing can cause the bars to be crumbly and tough.
You can adjust the chocolate chips, M&M’s, and sprinkles amounts however you’d like. The quantities given here produce a chewy blondie with lots of chocolate and sprinkle flavor.
Oven temperatures vary and may need to be recalibrated periodically to ensure they are accurate. Make sure to keep a close eye on your cookie bars as the suggested baking time approaches.