These Halloween cookie bars are delicious squares topped with a chocolate frosting and your next spooky scare!

Halloween is the perfect time for fun, festive treats, and these Halloween Cookie Bars are a must-try! Soft, buttery cookie bars topped with a rich chocolate frosting make for the ultimate crowd-pleaser. Whether you’re hosting a Halloween party, making treats for school, or just want something sweet to enjoy with a cozy fall movie, these bars are a no-fail option.

Why You’ll Love This Recipe

Easy to Make – No rolling or cutting dough like traditional cookies. Just press, bake, and frost!
Perfect for a Crowd – Cut them into squares for the ideal party-sized treat.
Make-Ahead Friendly – These Halloween Cookie Bars store well, making them perfect for prepping in advance.
Customizable Toppings – Add festive Halloween sprinkles, crushed candy, or spooky edible decorations!
Rich & Buttery Flavor – A soft, melt-in-your-mouth cookie base with a creamy chocolate frosting.

How to Make Halloween Cookie Bars

Ingredients

For the Cookie Bars

3 cups all-purpose flour (plus extra for dusting)
1 large egg (room temperature)
1 ¼ teaspoons baking powder
2 teaspoons vanilla extract
1 ¼ cups granulated sugar
1 teaspoon milk
1 cup unsalted butter (room temperature)
Pinch of salt

For the Chocolate Frosting

2 cups powdered sugar
5 tablespoons heavy whipping cream
1 teaspoon vanilla extract
2 tablespoons cocoa powder
2 tablespoons unsalted butter (melted)

Instructions

Prepare the Dough
- Take the butter out an hour before baking to soften.
- Preheat your oven to 350°F and line an 8×8-inch baking pan with parchment paper.
- In a stand mixer, cream the butter and sugar together on medium speed for about 2 minutes until light and fluffy. Scrape down the sides of the bowl.
- Lower the speed and mix in the milk, vanilla extract, and egg. Scrape down the bowl again.
- Add the baking powder, then gradually mix in the flour, one cup at a time, until a dough forms.
Bake the Bars
- Press the dough evenly into the prepared baking pan.
- Bake for 25-30 minutes, or until the edges are golden brown.
- Let the bars cool completely before adding frosting.
Make the Frosting
- In a stand mixer, whisk together the melted butter, cocoa powder, powdered sugar, heavy cream, and vanilla extract until smooth and fluffy.
Decorate & Serve
- Spread the chocolate frosting over the cooled cookie bars.
- Sprinkle with fun Halloween-themed toppings like sprinkles, crushed candy, or edible googly eyes.
- Cut into 9-12 squares and enjoy Halloween Cookie Bars!

Storage Tips

Room Temperature: Store these Halloween Cookie Bars in an airtight container for up to 3 days.
Refrigerator: Keep for up to a week for a firmer texture.
Freezer: Freeze unfrosted Halloween Cookie Bars for up to 3 months, then frost after thawing.

More Halloween Treat Ideas

Looking for more spooky sweets? Try making:
🎃 Bloody Chocolate Cupcakes
👻 Spider Oatmeal Cookies
🦇 Graveyard Chocolate Cookie Dip Board

These Halloween Cookie Bars will be the hit of your spooky season, whether for a party or a fun baking day at home. Get creative with decorations and enjoy a festive, chocolatey treat!