Halloween Oreo Brownies Recipe
Introduction
Celebrate Halloween with these festive Oreo brownies that combine rich chocolate flavor with spooky decorations. They’re moist, chewy, and packed with crushed Oreos for a fun twist on a classic treat.

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 the oven to 350°F (175°C). Line a 9×13 inch baking pan with parchment paper, leaving an overhang on the sides, and lightly grease it.
- Step 2: Melt 2/3 cup butter and let it cool slightly. In a large bowl, whisk together the melted butter with granulated sugar and brown sugar until the mixture is smooth. Beat in the cold eggs one at a time, then stir in vanilla extract.
- Step 3: In a separate bowl, whisk together the sifted cocoa powder, all-purpose flour, and salt until well combined.
- Step 4: Gradually add the dry ingredients to the wet ingredients, mixing gently until just combined. Avoid overmixing. Fold in the coarsely crushed Oreo cookies carefully.
- 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. Allow the brownies to cool completely on a wire rack for 1-2 hours.
- Step 6: To make the frosting, beat the softened butter until light and fluffy. Gradually add powdered sugar, vanilla extract, a pinch of salt, and milk or cream. Beat until smooth and spreadable. Mix in green gel food coloring until you reach a spooky green hue.
- Step 7: Once the brownies have fully cooled, spread the green buttercream evenly over the top. Arrange the Halloween-themed Oreo cookies on the frosted brownies. Decorate with edible candy eyes and, if desired, sprinkle Halloween-themed sprinkles or drizzle melted chocolate for an extra festive look.
- Step 8: Chill the decorated brownies in the refrigerator for at least 30 minutes to set the frosting for clean slicing. Use a hot, clean knife to slice and serve.
Tips & Variations
- Use cold eggs for better texture and incorporate them slowly to avoid curdling.
- For a more intense chocolate flavor, add a teaspoon of espresso powder to the dry ingredients.
- Swap the green food coloring for orange or purple to match your Halloween theme.
- If you prefer a lighter frosting, replace some of the butter with cream cheese for a tangy twist.
Storage
Store brownies in an airtight container at room temperature for up to 3 days or refrigerate for up to one week. If refrigerated, allow brownies to come to room temperature before serving for the best texture. Reheat briefly in the microwave if desired.
How to Serve
Serve this delicious recipe with your favorite sides.
FAQs
Can I use regular Oreos instead of Halloween-themed ones?
Yes, regular Oreos work perfectly for the batter and decoration. Halloween-themed Oreos just add a festive touch.
How do I get clean slices when cutting frosted brownies?
Chilling the brownies for at least 30 minutes firms up the frosting, making it easier to cut clean slices. Using a hot, clean knife for each cut also helps prevent sticking.
PrintHalloween Oreo Brownies Recipe
Delightfully rich and fudgy Halloween Oreo Brownies featuring coarsely crushed Oreo cookies folded into the batter and a spooky green buttercream frosting. Topped with themed Oreos, candy eyes, and festive sprinkles, these brownies are perfect for Halloween celebrations and sure to impress both kids and adults with their creamy texture and festive decorations.
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Total Time: 1 hour 50 minutes
- Yield: 16 brownies 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
Ingredients
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
Green Buttercream 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 (for topping)
- Edible candy eyes
- Assorted Halloween sprinkles (optional)
- Melting chocolate (white or dark, optional, for decoration)
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 for easy removal, and lightly grease it to prevent sticking.
- Combine Wet Ingredients: Melt 2/3 cup unsalted butter and allow it to cool slightly. In a large mixing bowl, whisk together the melted butter with 1 cup granulated sugar and 1/3 cup brown sugar until smooth. Beat in 2 cold eggs, one at a time, ensuring each is fully incorporated, then add 1 tsp pure vanilla extract and mix well.
- Mix Dry Ingredients: In a separate bowl, whisk together 2/3 cup sifted unsweetened cocoa powder, 1/2 cup all-purpose flour, and 1/2 tsp salt until evenly combined.
- Combine & Add Oreos: Gradually add the dry ingredients into the wet ingredients, mixing just until combined to avoid overmixing. Gently fold in the 15 coarsely crushed Oreo cookies, distributing them evenly throughout the batter.
- Bake Brownies: Pour the prepared batter evenly into the lined baking pan. Bake in the preheated oven for 25 to 30 minutes, or until a toothpick inserted into the center comes out with moist crumbs. Avoid overbaking to maintain fudginess. Cool the brownies completely on a wire rack, about 1 to 2 hours.
- Prepare Green Frosting: Beat 1 cup of 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 to 4 tablespoons of milk or heavy cream, beating until the frosting is smooth and spreadable. Mix in green gel food coloring until you achieve the desired spooky shade.
- Assemble & Decorate: Once the brownies are fully cooled, spread the green buttercream frosting evenly over the top. Arrange the remaining 5 Halloween-themed Oreo cookies on the frosted surface. Decorate with edible candy eyes and, if desired, add Halloween sprinkles or drizzle melted chocolate in spiderweb patterns for extra festive flair.
- Chill, Slice & Serve: Chill the decorated brownies in the refrigerator for at least 30 minutes to allow the frosting to set for clean slicing. Remove from fridge, slice using a hot, clean knife for neat edges, and serve. Store leftovers in an airtight container at room temperature for up to 3 days or refrigerated for up to one week.
Notes
- Make sure not to overmix the batter to keep the brownies fudgy.
- Cooling the brownies completely before frosting prevents melting and sliding of the frosting.
- Using a hot knife to slice makes for cleaner edges on frosted brownies.
- Store brownies in an airtight container to maintain freshness.
- For a dairy-free version, substitute butter and milk with plant-based alternatives.
Keywords: Halloween brownies, Oreo brownies, holiday dessert, spooky treats, chocolate brownies, Halloween party food

