Halloween Cookie Bars

These spooky Halloween cookie bars are packed with colorful M&M's and festive sprinkles—perfect for parties!

45 min Serves 12 Medium American

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These Halloween cookie bars are easy to make with a soft, chewy base loaded with orange, green, and purple M&M's plus monster mash sprinkles. After a quick bake and cool, they're ready to slice and serve for any spooky celebration.

Directions

Set your oven to 350°F.

In a stand mixer, combine the softened butter, granulated sugar, and brown sugar. Beat on low for 1 minute until blended. Gradually add the eggs and vanilla, then mix on medium for 1 minute.

Stop the mixer. Add the flour, baking soda, and salt. Mix on low, increasing to medium for 1 minute. Lower speed to low and add 1½ cups of M&M's and the sprinkles. Mix just until combined.

Spray a 9x13-inch glass baking dish with cooking spray. Use a silicone spatula to transfer the dough into the dish and spread it evenly. Sprinkle the remaining ½ cup of M&M's on top.

Bake for 30–35 minutes until golden. Remove from the oven and let cool for 30 minutes before cutting. Store in an airtight container for up to 5 days.