Easy Halloween M&M Cake Mix Bars

October 26, 2022

These Easy Halloween M&M Cake Mix Bars are a fun treat to make during spooky season and it only takes five ingredients to make them including Halloween M&M’s sprinkles!

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It feels like I’ve been in total baking mode since the weather’s cooled off.  I’ve made focaccia bread, apple cinnamon bread, Pumpkin White Chocolate Chip Bars, and a ton of pumpkin cinnamon rolls!  But I hadn’t really baked anything for Halloween.  So while I was deciding what kind of spooky treats to bake, I was reminded of one of my past recipes.

If this recipe sounds familiar, it’s because it’s based off of my Easy Cake Mix Holiday M&M Bars.  I have a bunch of Halloween sprinkles in my kitchen cabinet, so I thought it would be fun to put a spooky spin on these cake mix bars!  Just like the original recipe, I also added M&M’s to the mix – Ghoul’s Mix M&M’s in purple, green, and orange Halloween colors.

These cake mix bars are easy to whip up for your spooky season festivities!  All you need is a box of yellow cake mix, eggs, butter, M&M’s, and some Halloween sprinkles!  Then, bake, cool, and cut into bars for a ghoulishly good treat!

Easy Halloween M&M Cake Mix Bars

These Halloween M&M Cake Mix Bars are perfectly sweet and chewy.  The crunch of milk chocolate M&M’s is delicious and the Halloween sprinkles add a fun and festive touch!  Get creative with creepy sprinkles like edible eyes and Halloween shapes!

The first thing we need to do is add a couple of eggs and melted butter to a mixing bowl.  If the butter is still warm from being melted, add it a gradually to the eggs.  Then, add the box of cake mix and mix just until combined.

Now we can fold in our Ghoul’s Mix M&M’s and Halloween sprinkles. Save some extra candy and sprinkles to add to the top of the cake mix.

Spoon the dough into a greased 9″x13″ baking pan. Press it evenly into the pan with a rubber spatula.  If desired, add more M&M’s and sprinkles on top.

Bake the bars for 18-20 minutes at 350 degrees, or until the edges are golden brown and the center is cooked through.  Allow the bars to cool completely, then cut into squares and serve!

Easy Halloween M&M Cake Mix Bars

Easy Halloween M&M Cake Mix Bars


  • 1 box yellow cake mix
  • 2 eggs
  • 1 stick butter, melted
  • 1 cup Ghoul's Mix M&M's
  • 1/3 cup Halloween sprinkles


  1. Preheat oven to 350º. Grease a 9" x 13" pan with non-stick cooking spray.
  2. Beat the eggs and butter together just until combined.
  3. Then, add the cake mix and mix until combined.
  4. Fold in the Halloween M&M's and sprinkles.
  5. Spread the batter into the prepared pan. If desired, add more M&M's and sprinkles on top.
  6. Bake for 18-20 minutes, or until golden brown around the edges and a toothpick comes out clean from the center.
  7. Allow the bars to cool completely in the pan before cutting into bars and serving.
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Don’t have Halloween sprinkles hiding in your cabinet?  You can swap out the yellow cake mix and use Halloween Funfetti mix instead!  Then, mix in some M&M’s and bake!

Did you make this Easy Halloween M&M Cake Mix Bars recipe? Share your pics using the hashtag #livinglavidaeats. Don’t forget to tag me @lavidaholoka!


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