Spooky Halloween Monster Cookie Recipe for Party Treats

These googly-eyed, colorful Halloween monster cookies are adorable and easy to make. Soft and chewy, they’re packed with peanut butter, oats, and seasonal candies for a festive bite. Ready in about 30 minutes, they’re ideal for last-minute party prep or an after-school treat. Kids love helping decorate them, and you can swap in any Halloween-themed candies you have on hand.

Monster Cookies for Halloween

This recipe is a simple, nostalgic twist on classic monster cookies. The dough mixes oats for texture and creamy peanut butter for richness, then gets a festive boost from colorful candies like Halloween M&M’s and candy corn. The dough comes together in one bowl and bakes quickly, so it’s a stress-free baking project for busy families who still want something fun for Halloween.

How to Keep Candy Eyes from Melting

For bakery-style cookies, bake as directed and immediately press extra candies and candy eyes onto each cookie as soon as they come out of the oven. This keeps the candy eyes from melting and gives each cookie plenty of crunchy, decorative pieces.

Halloween Monster Cookies Recipe

Googly-eyed and colorful, these monster cookies are filled with candy and easy to make—soft, chewy, and festive.

Prep Time:
10 mins

Cook Time:
20 mins

Total Time:
30 mins

Equipment

• Kitchen scale (optional)
• Baking sheet
• Stand mixer
• Cookie portion scoop

Serves
18 cookies

Ingredients

• ¼ cup unsalted butter, room temperature (½ stick)
• 1 cup brown sugar
• 1 large egg, room temperature
• 1 cup creamy peanut butter
• 1 teaspoon pure vanilla extract
• 2 cups old-fashioned oats
• ½ cup all-purpose flour
• 1 teaspoon baking soda
• ½ cup Halloween M&M’s candies
• ¼ cup candy corn
• Candy eyes (optional, for garnish)

US Customary | Metric

Instructions

1. Preheat the oven to 350°F. Line a baking sheet with parchment paper and set aside.
   
2. In a stand mixer fitted with the paddle attachment, beat the butter and brown sugar until light and fluffy.
3. Add the egg, peanut butter, and vanilla and mix until combined.
   
4. Stir in the oats, flour, and baking soda until just combined. Avoid overmixing to keep the cookies tender.
   
5. Fold in the Halloween M&M’s and candy corn with a rubber spatula so the dough stays light.
   
6. Scoop 1-inch balls onto the prepared baking sheet, spacing them about 2 inches apart. Bake for about 15 minutes, or until the edges are set.
7. Remove from the oven and allow the cookies to cool on the pan until they reach room temperature. While they are still warm, press candy eyes onto the cookies.
   

Notes

I prefer creamy peanut butter for best texture; crunchy works if you like extra crunch. Avoid all-natural peanut butter—the excess oil can make the dough too loose.

Tips:

• Use a cookie scoop so all cookies are uniform and bake evenly.
• Let cookies cool on the pan a bit before moving them to a rack to prevent breakage.
• Swap in your favorite seasonal candies as desired.
• Nutritional information does not include optional ingredients.

Storage: Store in an airtight container at room temperature for up to 3 days, in the refrigerator for up to 5 days, or frozen up to 1 month. Thaw in the refrigerator overnight.

Nutrition Facts

Halloween Monster Cookies Recipe

Amount Per Serving

Calories 222

Fat 10g (15%)

Carbohydrates 30g

Protein 6g

* Percent Daily Values are based on a 2000 calorie diet.

Author: Becky Hardin

Course: Dessert

Cuisine: American

How to Make Halloween Monster Cookies Step-by-Step

Prep: Gather ingredients and bring butter and egg to room temperature for 30–60 minutes. Preheat the oven to 350°F and line a baking sheet with parchment paper.

Beat the Butter: In a stand mixer with the paddle attachment, beat ¼ cup room-temperature unsalted butter and 1 cup brown sugar until light and fluffy. Add 1 large room-temperature egg, 1 cup creamy peanut butter, and 1 teaspoon vanilla extract and mix until combined. If your peanut butter is refrigerated, allow it to warm slightly so it blends smoothly.

Mix the Dough: Add 2 cups old-fashioned oats, ½ cup all-purpose flour, and 1 teaspoon baking soda. Mix until just combined—overmixing can make the cookies dry.

Add the Mix-Ins: Fold in ½ cup Halloween M&M’s and ¼ cup candy corn with a rubber spatula to keep the dough tender.

Bake the Cookies: Scoop 1-inch balls onto the prepared sheet, spacing them at least 2 inches apart. Bake 15 minutes or until edges are set. Let the cookies cool on the pan, then press candy eyes onto each cookie while still warm.

How to Store and Freeze

Store cookies in an airtight container at room temperature for up to 3 days, in the refrigerator for up to 5 days, or in the freezer for up to 1 month. Thaw overnight in the refrigerator before serving.