Introduction

These Halloween Oreo Brownies combine rich, fudgy chocolate with crunchy Oreo pieces and a festive green frosting. Perfect for spooky celebrations, they’re fun to make and even more fun to eat. The candy eyes and Halloween-themed cookies add a playful touch to this classic dessert.

Halloween Oreo Brownies Recipe - Recipe Image

Ingredients

2/3 cup unsalted butter, melted
1/4 cup vegetable oil
1 cup granulated sugar
1/3 cup brown sugar
2 large eggs, cold
1 tsp pure vanilla extract
2/3 cup unsweetened cocoa powder, sifted
1/2 cup all-purpose flour, spooned and leveled
1/2 tsp salt
15 Oreo cookies, coarsely crushed
1 cup unsalted butter, softened (for frosting)
4 cups powdered sugar, sifted (for frosting)
1/2 tsp pure vanilla extract (for frosting)
3-4 tbsp milk or heavy cream (for frosting)
Green gel food coloring (for frosting)
Pinch of salt (for frosting)
5 Halloween-themed Oreo cookies (for topping)
Edible candy eyes (for decoration)
Assorted Halloween sprinkles (optional)
Melting chocolate (white or dark, optional, for decoration)

Instructions

Step 1: Preheat oven to 350°F (175°C). Line a 9×13 inch baking pan with parchment paper, leaving an overhang, and grease lightly.
Step 2: Melt 2/3 cup butter and let cool slightly. In a large bowl, whisk melted butter with 1 cup granulated sugar and 1/3 cup brown sugar until smooth. Beat in 2 cold eggs one at a time, then stir in 1 tsp pure vanilla extract.
Step 3: In a separate bowl, whisk together 2/3 cup sifted unsweetened cocoa powder, 1/2 cup all-purpose flour, and 1/2 tsp salt.
Step 4: Gradually add the dry ingredients to the wet mixture, mixing until just combined. Do not overmix. Gently fold in 15 coarsely crushed Oreo cookies.
Step 5: Pour the batter evenly into the prepared pan. Bake for 25–30 minutes, or until a toothpick inserted into the center comes out with moist crumbs. Avoid overbaking. Cool completely on a wire rack for 1–2 hours.
Step 6: For the frosting, beat 1 cup softened unsalted butter until light and fluffy. Gradually add 4 cups sifted powdered sugar, 1/2 tsp pure vanilla extract, a pinch of salt, and 3-4 tbsp milk. Beat until smooth and spreadable. Mix in green gel food coloring until you reach a spooky green hue.
Step 7: Once the brownies are fully cooled, spread the green buttercream evenly over the top. Arrange 5 Halloween-themed Oreo cookies on the frosting. Decorate with edible candy eyes and optional Halloween sprinkles or melted chocolate drizzles.
Step 8: Chill the decorated brownies in the refrigerator for at least 30 minutes to make clean slicing easier. Remove from fridge, slice with a hot, clean knife, and serve.

Tips & Variations

For extra fudginess, avoid overbaking and test brownies with a toothpick for moist crumbs.
Use dark or white melting chocolate to create spiderweb patterns on top for added Halloween flair.
Substitute regular Oreos with flavored ones like double-stuffed or mint for a twist.
Adjust the green food coloring gradually to get just the right spooky shade without tasting artificial.

Storage

Store these brownies in an airtight container at room temperature for up to 3 days or refrigerated for up to a week. For best texture, let refrigerated brownies come to room temperature before serving. Leftover brownies can be reheated briefly in the microwave to soften the frosting.

How to Serve

Serve this delicious recipe with your favorite sides.

FAQs

Can I make these brownies ahead of time?

Yes, you can bake and frost these brownies a day in advance. Keep them refrigerated and bring to room temperature before serving for the best taste and texture.

Can I freeze the brownies?

Yes, freeze unfrosted brownies tightly wrapped for up to 3 months. Thaw completely before adding frosting and decorating to preserve freshness and appearance.

Halloween Oreo Brownies Recipe

Print Recipe

★★★★★

4.6 from 142 reviews

Delightfully rich and festive Halloween Oreo Brownies featuring a moist cocoa batter loaded with crunchy Oreo pieces, topped with a vibrant green buttercream frosting and decorated with spooky Halloween-themed Oreos, candy eyes, and sprinkles for a fun seasonal treat.

Author: Elias
Prep Time: 15 minutes
Cook Time: 25-30 minutes
Total Time: 1 hour 45 minutes
Yield: 12–16 servings 1x
Category: Dessert
Method: Baking
Cuisine: American

Ingredients

Scale

Brownie Batter

2/3 cup unsalted butter, melted
1/4 cup vegetable oil
1 cup granulated sugar
1/3 cup brown sugar
2 large eggs, cold
1 tsp pure vanilla extract
2/3 cup unsweetened cocoa powder, sifted
1/2 cup all-purpose flour, spooned and leveled
1/2 tsp salt
15 Oreo cookies, coarsely crushed

Frosting

1 cup unsalted butter, softened
4 cups powdered sugar, sifted
1/2 tsp pure vanilla extract
3–4 tbsp milk or heavy cream
Green gel food coloring
Pinch of salt

Decoration

5 Halloween-themed Oreo cookies
Edible candy eyes
Assorted Halloween sprinkles (optional)
Melting chocolate (white or dark, optional)

Instructions

Prepare Pan & Oven: Preheat your oven to 350°F (175°C). Line a 9×13 inch baking pan with parchment paper, leaving an overhang on the sides for easy removal after baking, and lightly grease the parchment to prevent sticking.
Combine Wet Ingredients: Melt 2/3 cup of unsalted butter and let it cool slightly. In a large mixing bowl, whisk together melted butter, 1 cup granulated sugar, and 1/3 cup brown sugar until smooth. Then, beat in the 2 cold eggs one at a time to ensure proper emulsification, followed by 1 teaspoon of pure vanilla extract.
Mix Dry Ingredients: In a separate bowl, thoroughly whisk together the sifted unsweetened cocoa powder, all-purpose flour, and salt to evenly distribute and avoid lumps.
Combine & Add Oreos: Gradually add the dry ingredients into the wet mixture, folding gently until just combined to avoid overmixing which could make brownies tough. Fold in the 15 coarsely crushed Oreo cookies, making sure they are evenly dispersed throughout the batter.
Bake Brownies: Pour the prepared batter into the lined baking pan and spread evenly. Bake for 25 to 30 minutes or until a toothpick inserted into the center comes out with moist crumbs but not wet batter. Avoid overbaking to keep the brownies fudgy. Once done, cool completely on a wire rack for 1 to 2 hours.
Prepare Green Frosting: Beat 1 cup of softened unsalted butter until light and fluffy using a mixer. Gradually add 4 cups of sifted powdered sugar, along with 1/2 teaspoon vanilla extract, a pinch of salt, and 3 to 4 tablespoons of milk or heavy cream, beating continuously until smooth and spreadable. Stir in green gel food coloring until you achieve a spooky, vibrant green hue.
Assemble & Decorate: After the brownies have cooled completely, spread the green buttercream frosting evenly over the top. Arrange the remaining 5 Halloween-themed Oreo cookies decoratively across the surface. Add edible candy eyes and, if desired, sprinkle on assorted Halloween sprinkles or drizzle with melted white or dark chocolate to mimic spiderwebs or add extra flair.
Chill, Slice & Serve: Place the decorated brownies in the refrigerator to chill for at least 30 minutes to firm up the frosting and help with clean slicing. Using a hot, clean knife, slice the brownies into desired portions and serve. Store leftovers in an airtight container at room temperature for up to 3 days or refrigerate for up to one week.

Notes

For best results, use room temperature ingredients where called for, except eggs which are used cold here as per recipe.
Do not overmix the batter after adding dry ingredients to maintain fudgy texture.
Chilling the brownies after decorating helps achieve clean slices without smudging the frosting.
If you don’t have green gel food coloring, use any gel coloring but green is recommended for the Halloween theme.
Store brownies properly in an airtight container to maintain freshness.
Optional decorations like melted chocolate and sprinkles add visual appeal but can be omitted.

Keywords: Halloween brownies, Oreo brownies, festive dessert, chocolate brownies, Halloween treats, holiday baking