Name: Monster Mash Brownies
Prep time: 10 min
Cook time: 30 min
Total time: 45 min
Cuisine: American
Ingredients: 1 cup all-purpose flour; 1/2 cup cocoa powder; 1 cup granulated sugar; 2 large eggs; 1/2 cup butter or oil; 1 tsp vanilla extract; 1/4 tsp salt; Optional: 1/2 cup chocolate chips; Candy eyeballs; Halloween sprinkles; Melted white chocolate or candy melts (green, purple, orange, etc.); Food coloring (if needed); Optional: frosting or icing for drizzling

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Monster Mash Brownies are fudgy, festive, and full of Halloween spirit. I take rich chocolate brownies and turn them into a spooky treat by topping them with colorful candy eyeballs, sprinkles, and swirls of Halloween-colored frosting or melted chocolate. It’s the kind of recipe I love making when I want something simple, sweet, and visually fun for a Halloween party or movie night.

Why You’ll Love This Recipe

I love Monster Mash Brownies because they’re easy to make and instantly put everyone in a playful mood. Whether I use homemade brownie batter or a box mix, I always end up with a crowd-pleasing dessert. The decorations are where I get to be creative—I can go silly, creepy, or cute depending on my mood. These brownies are also a great baking activity for kids, and the results are always a hit. Monster Mash Brownies Ingredients

(Here’s a tip: Check out the full list of ingredients and measurements in the recipe card below.)

For the brownies:

All-purpose flour
Cocoa powder
Granulated sugar
Eggs
Butter or oil
Vanilla extract
Salt
Optional: chocolate chips for extra gooeyness

Toppings & Decorations:

Candy eyeballs
Halloween sprinkles
Melted white chocolate or candy melts (green, purple, orange, etc.)
Food coloring (if coloring your own chocolate or frosting)
Optional: frosting or icing for drizzling

Directions

I preheat the oven to 350°F and line a baking pan with parchment paper.
I make the brownie batter from scratch or prepare a box mix according to instructions, then pour it into the prepared pan.
I bake the brownies until set and fudgy—usually 25–30 minutes—then let them cool completely.
Once cooled, I drizzle melted colored chocolate or frosting over the top in fun zigzag patterns.
I press on candy eyeballs, Halloween sprinkles, and any other creepy decorations I want to add.
I let the toppings set, then cut the brownies into squares or rectangles and serve.

Servings and timing

This recipe makes about 12–16 brownies, depending on how I cut them. It takes about 45 minutes total—10 minutes for prep, 25–30 minutes for baking, plus cooling and decorating time.

Variations

I sometimes swirl peanut butter or cream cheese into the batter before baking for extra flavor. If I want them even richer, I stir in chopped candy bars or M&M’s. For a spooky twist, I bake them in muffin tins and decorate each one as a little monster face. I’ve also added green food coloring to the brownie mix for a ghoulish surprise inside.

storage/reheating

I store them in an airtight container at room temperature for up to 3 days. If I refrigerate them, they stay good for up to 5 days, but I let them come to room temp before serving. They freeze well too—I wrap them tightly and freeze for up to a month. Monster Mash Brownies

FAQs

Can I use a brownie mix?

Absolutely. When I’m in a hurry, I use my favorite box mix and just focus on the decorating. The fun is in the monster makeover.

How do I get clean cuts with all the toppings?

I use a sharp knife and wipe it clean between each cut. If the toppings are soft, I chill the brownies first so they slice more cleanly.

What kind of chocolate works best for the drizzle?

I use white chocolate or candy melts because they take food coloring well and stand out against the dark brownie base.

Can kids help make these?

Yes! Decorating is the best part for kids. I set out toppings and let them go wild with candy eyes, sprinkles, and colors.

How far ahead can I make these?

I usually make them a day ahead, especially for parties. The brownies stay moist, and the decorations hold up well overnight.

Conclusion

Monster Mash Brownies are one of my favorite ways to celebrate Halloween in the kitchen. They’re chocolaty, chewy, and just the right mix of spooky and sweet. I love how easy they are to customize with colors and toppings, and they always get big smiles from anyone who sees (and eats) them. Whether I’m making them with kids or just for fun, they’re a guaranteed hit every time.