Slime-Filled Halloween Cookies

Looking for a show-stopping treat to bring some spooky magic to your Halloween celebrations? These Slime-Filled Halloween Cookies are the perfect dessert for the season, with a surprise gooey “witches brew” frosting that oozes from the center. They’re fun to make, easy to customize, and a guaranteed hit at any party!

Soft, chocolatey cookies filled with neon green frosting are a whimsical delight that will have everyone talking. Trust me, once you serve these eerie treats, your guests won’t be able to resist biting into that slime-filled center!

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Why You’ll Love These Slime-Filled Halloween Cookies

• Perfect for Halloween: These cookies not only look the part but are a fun and interactive dessert—perfect for kids and adults alike!
• Rich and Chocolatey: The soft chocolate cookie dough is the perfect backdrop for the sweet green frosting.
• Surprise Filling: The oozy green “slime” in the middle adds a surprise element that everyone will love.
• Easy to Make: While they look fancy, they’re actually quite simple. You’ll be filling cookies with frosting like a pro in no time!

What Do These Cookies Taste Like?

Think of a rich, soft chocolate cookie, but with a sweet, creamy surprise inside. The neon green frosting is both whimsical and tasty, with a smooth texture that complements the cookie’s chewiness. Plus, the colorful M&Ms add extra sweetness and crunch with every bite!

Ingredients You’ll Need

For the cookies:

• 1 cup sweet cream unsalted butter (softened)
• ¾ cup sugar
• ⅔ cup packed brown sugar
• 2 large eggs
• 1 tsp vanilla extract
• 2¼ cups all-purpose flour
• ⅔ cup unsweetened cocoa powder
• 1 tsp baking soda
• ¼ tsp salt
• M&M candies (orange, green, and purple)

For the slime filling:

• 16 oz white frosting (about one container)
• 5 drops neon green gel food coloring

Tools You’ll Need

• Medium mixing bowl
• Small mixing bowl
• Electric mixer
• Cookie sheet
• Parchment paper or silicone baking mat
• Flavor injector (or a piping bag)

How to Make Slime-Filled Halloween Cookies

Step 1: Prepare the Cookie Dough

1. Preheat your oven to 350°F (175°C) and line a cookie sheet with parchment paper or a silicone baking mat.
2. Separate your M&Ms by color into a small bowl.
3. In a medium bowl, sift together the flour, baking soda, salt, and cocoa powder. Set aside.
4. In a large mixing bowl, use an electric mixer to cream the butter, sugar, and brown sugar until light and fluffy.
5. Add in the eggs and vanilla extract, and continue mixing until fully incorporated.
6. Gradually add the dry ingredients to the wet mixture, mixing on low until combined.
7. Stir in about half of the M&M candies to evenly distribute them throughout the dough.

The 2nd Step : Shape and Bake the Cookies

1. Roll the cookie dough into 2-inch balls and place them on the prepared cookie sheet.
2. Gently press the remaining M&Ms on top of each dough ball for a colorful, festive look.
3. Bake for 9-11 minutes, until the edges are set but the centers remain soft.
4. Allow the cookies to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.

Step 3: Make the Slime Filling

1. Scoop the white frosting into a microwave-safe bowl and heat it for about 15 seconds to soften.
2. Add the green gel food coloring and stir until the frosting is bright neon green.
3. Using a flavor injector (or a piping bag with a small tip), fill each cookie with the frosting. Insert the injector into the side of the cookie and carefully squeeze the frosting in until the top of the cookie cracks.

The 4th Step : Serve and Enjoy!

Once all the cookies are filled, they’re ready to serve! These cookies will be the highlight of your Halloween dessert table, with their spooky slime-filled centers and festive colors.

Tips for Making Perfect Slime-Filled Cookies

• Chill the Dough: If your cookie dough feels too soft, chill it in the fridge for about 30 minutes. This makes it easier to handle and helps the cookies maintain their shape while baking.
• Be Gentle with the Frosting: Don’t overfill the cookies with frosting! A little goes a long way, and too much can cause the cookies to crack wide open.
• Mix Up the Colors: You can experiment with different food coloring to create purple or orange slime if you want to change things up!

What to Serve with These Cookies

To complete your spooky dessert table, serve these cookies alongside:

• Witch’s Brew Punch (a fizzy, green drink that pairs perfectly with the cookies)
• Halloween Chocolate Bark (for a sweet and crunchy treat)
• Ghost Cupcakes (soft, fluffy cupcakes topped with marshmallow ghosts)

These festive treats will create the perfect Halloween spread that your guests will love!

How to Store Slime-Filled Cookies

Store these cookies in an airtight container at room temperature for up to 3 days. If you’d like to keep them longer, store them in the refrigerator for up to a week. You can also freeze the unfilled cookies and inject the frosting after thawing them.

Frequently Asked Questions

Can I use homemade frosting instead of store-bought?

Absolutely! Homemade frosting can be used in place of store-bought if you prefer a more customized flavor. Just make sure it’s smooth and spreadable for easy injecting.

Can I make these cookies ahead of time?

Yes! Bake the cookies a day in advance and store them in an airtight container. You can inject the frosting just before serving to keep them fresh and gooey.

What if I don’t have a flavor injector?

If you don’t have a flavor injector, no worries! You can use a piping bag with a small tip to inject the frosting, or carefully hollow out a small hole in the cookie and fill it with frosting before covering it back up.

Conclusion

There’s no better way to celebrate Halloween than with these Slime-Filled Halloween Cookies. They’re fun, festive, and will bring a little spooky magic to your dessert table. Not only do they look incredible with their neon green filling, but they’re also delicious with their soft, rich chocolate base. Whether you’re hosting a Halloween party or looking for a fun baking project, these cookies will steal the show.

If you loved this recipe, make sure to check out my other Halloween-inspired desserts like [Link recipe 1], [Link recipe 2], and [Link recipe 3].

And don’t forget to share your creations on Pinterest—I’d love to see how your slime-filled cookies turn out! Follow me here.

Nutrition (per serving)

• Calories: 298 kcal
• Carbohydrates: 43g
• Protein: 3g
• Fat: 14g
• Saturated Fat: 7g
• Cholesterol: 41mg
• Sodium: 144mg
• Potassium: 85mg
• Fiber: 1g
• Sugar: 29g
• Vitamin A: 307 IU
• Calcium: 18 mg
• Iron: 1 mg

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