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Halloween M&M Cookie Bars in glass baking dish with pinterest title text.

Halloween M&M Cookie Bars

Nothing completes Halloween without making a batch of my Halloween M&M Cookie Bars. Full of Halloween M&M’s and sprinkles!
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Course: Dessert
Cuisine: American
Prep Time: 10 minutes
Cook Time: 35 minutes
Total Time: 45 minutes
Servings: 12 Servings



  • Preheat the oven to 350 degrees Fahrenheit.
  • Place the room temperature  butter in the KitchenAid Stand Mixer. Then pour in the granulated and brown sugar. Cream on low for 1 minute until incorporated. Then, slowly add in the eggs and vanilla extract. Mix on medium for 1 minute.
  • Turn off the mixer. Add in the all-purpose flour, baking soda, and salt. Mix on low and then gradually increase speed to medium for 1 minute. Reduce the speed to low and add in 1-1/2 cups M&M's and sprinkles. Mix until just incorporated.
  • Spray a 9x13 glass pan with cooking spray. Using a silicone spatula, scrape the cookie dough contents into the glass pan. Smooth out until even. Add the remaining 1/2 cup M&M's to the top of the pan.
  • Bake for 30-35 minutes or until golden in color. Remove from the oven and let rest for 30 minutes before cutting. Store in an air tight container for up to 5 days.
Tried this Recipe? Tag me Today!Mention @KatieJasiewicz or tag #katiescucina!