I still remember the first time I coaxed those pillowy marshmallows into a glossy white coat—gentle sizzling as the chocolate hit and a nutty toasted scent wafting up. These Ghost Marshmallow Brownies halloween treats made their debut at my October bake-off after three rounds of tinkering. I learned to slice those ghosts just so, discovering that a 50% power microwave melt keeps the white chocolate silky smooth. From fudgy crumbs peeking at the edges to the crackling snap when you bite through, each test revealed a new trick to nail that cheeky spectral look.
Why You’ll Love Ghost Marshmallow Brownies halloween treats
- Fun festive shapes that delight kids and adults alike, blending spooky with sweet.
- Box-mix shortcut plus whimsical marshmallow ghosts—minimal hands-on time.
- Soft-chewy brownie base with a glossy coating that crackles as it cools.
- Marshmallows have been a Halloween staple since the early 1900s—cultural nod you’ll enjoy.

A Little Background
On a rainy October afternoon, I tried the original Delish method and noticed the ghosts sliding off. After extending the chill time and swapping a foil-lined pan, I saw the chocolate set with a glossy surface and the marshmallows stand tall. Halloween is all about playful treats—so I leaned into the fun of marshmallow ghosts perching on fudgy brownies.
Key Ingredients for Ghost Marshmallow Brownies halloween treats
- Brownie Mix (18.3-oz.): Shortcut base—swap in homemade brownie batter if you prefer.
- Large Marshmallows (12): Slice in half crosswise for ghost shapes; use extra-fluffy brand.
- White Chocolate Chips (1 cup): Melts into a silky coating; higher-cocoa-butter content is ideal.
- Coconut Oil (1 tsp): Adds gloss and thins the chocolate; refined stays neutral.
- Black Decorating Gel: For drawing eyes and mouths; try gel or piping icing.
How to Make Ghost Marshmallow Brownies halloween treats
- Preheat oven to 350°F. Coat an 8-inch square pan with cooking spray and line bottom with foil.
- In a large bowl, whisk together 1 box (18.3-oz.) brownie mix, the eggs, ½ cup vegetable oil, and ¼ cup water until the batter is smooth—no dry streaks.
- Pour batter into prepared pan and bake until a toothpick inserted 4 inches from the edge comes out with moist crumbs, about 25–30 minutes.
- Let brownies cool completely in pan on a wire rack, about 30 minutes. Testing note: After one batch, I chilled the pan 10 extra minutes to make cutting neater.
- Transfer brownies to a cutting board and slice into 12 equal squares. Slice each marshmallow in half crosswise and press two halves into each brownie square, flat side first so they look like ghosts.
- In a large microwave-safe bowl, combine 1 cup white chocolate chips and 1 tsp coconut oil. Microwave at 50% power in 30-second bursts, stirring until smooth.
- Use a spoon to coat each marshmallow ghost in melted chocolate, letting excess drip off onto waxed paper. Place coated ghosts on waxed paper and refrigerate 10 minutes to set.
- Finish by piping eyes and mouths with black decorating gel. Serve once the faces are firm to the touch.

Pro Tips & Troubleshooting
- Use 50% microwave power to melt the white chocolate evenly without scorching.
- If ghosts slump, refrigerate pan with brownies before cutting to firm up edges.
- Mix in a drop of orange food coloring for a spooky tinted coating.
- To halve the recipe, bake in a 7-inch pan for 20–25 minutes; double in a 9×13 pan for 30–35 minutes.
Storage & Make-Ahead Guide
Store brownies in an airtight container at room temperature for up to 2 days, then refrigerate for up to 4 days. For longer storage, freeze flat in a single layer for up to 1 month; thaw in fridge overnight. Reheat gently at room temperature to restore chewiness. Always wash hands before handling and keep away from direct sunlight to prevent melting.
Serving Suggestions
Arrange on a platter with candy corn and mini pumpkins for an extra Halloween vibe. Pair a brownie ghost with a scoop of vanilla ice cream for contrasting temperatures. Drizzle leftover white chocolate over hot cocoa for a marshmallow-topped mug that echoes these festive treats.

Frequently Asked Questions
- How long can I keep Ghost Marshmallow Brownies? You can store them at room temperature for 2 days or in the fridge for up to 4 days in an airtight container.
- Can I make Ghost Marshmallow Brownies ahead? Yes—bake and assemble ghosts a day ahead, then store covered and finish with gel just before serving.
- What’s the best way to melt white chocolate chips? Microwave at 50% power in 30-second intervals, stirring between, to avoid seizing.
- How do I prevent marshmallow ghosts from slipping? Chill the cooled brownies for 10 minutes before pressing in marshmallow halves to give them extra grip.
- Can I use homemade brownies instead of box mix? Absolutely—just ensure they’re fully cooled and firm enough to hold the marshmallows.
- How do I freeze Ghost Marshmallow Brownies? Lay them on a baking sheet until firm, then stack between parchment in an airtight container for up to 1 month.
Final Thoughts
These Ghost Marshmallow Brownies halloween treats always bring out smiles at parties with their glossy-coated marshmallow ghosts and fudgy bases. My favorite way? A slightly warm brownie ghost paired with a cold glass of milk. Give them a whirl, and share your spookiest decorating ideas—I can’t wait to see your beaming ghouls!
More Recipes You’ll Love
- Black Poison Swirl Candy Apples – brings another spooky twist with a glossy candy coating
- Pumpkin Snickerdoodle Cookies – cinnamon-spiced bites perfect alongside ghostly brownies
- Churro Cheesecake Donut Cookies – combines crunchy churro coating with creamy cheesecake filling
- Pumpkin Pie Tacos – playful handheld dessert that echoes fall flavors
Ghost Marshmallow Brownies
Ingredients
Brownie Base
- 1 18.3-ounce box fudge brownie mix
- 2 large eggs
- 0.5 cup vegetable oil
- 0.25 cup water
Ghost Topping
- 12 large marshmallows
- 1 cup white chocolate chips
- 1 teaspoon coconut oil
- 1 tube 1.0 ounce black decorating gel
Instructions
Brownie Base
- Preheat oven to 350°F. Coat an 8-inch square pan with cooking spray and line bottom with foil.
- In a large bowl, whisk together brownie mix, eggs, vegetable oil, and water until smooth.
- Pour batter into prepared pan and bake until a toothpick inserted 4 inches from edge comes out with moist crumbs, about 25–30 minutes.
- Let brownies cool completely in pan on a wire rack, about 30 minutes.
Ghost Topping
- Transfer brownies to a cutting board and slice into 12 squares. Slice each marshmallow in half crosswise and press two halves into each brownie square, flat side first.
- In a microwave-safe bowl, combine white chocolate chips and coconut oil. Microwave at 50% power in 30-second bursts, stirring until smooth.
- Spoon melted chocolate over each marshmallow ghost and let excess drip off onto waxed paper. Refrigerate 10 minutes to set.
- Finish by piping eyes and mouths with black decorating gel.