If you’re searching for a spellbinding treat sure to cast a delicious spell over your next party, these Bubbling Witch’s Cauldron Brownies are pure magic. Imagine rich, chocolatey brownies bubbling over with green “potion,” marshmallow froth, spooky candy eyes, and playful edible stirrers—all in a miniature cauldron! Not only will kids and grown-ups delight in decorating their own bubbling brews, the bold colors and whimsical toppings turn a classic dessert into the life of any spooky gathering. Whether you’re planning a Halloween bash or just need an enchanting rainy day activity, Bubbling Witch’s Cauldron Brownies deliver big on both flavor and fun.

Ingredients You’ll Need
-
Brownies:
- 1 box brownie mix (plus ingredients listed on the box)
Decoration:
- 1 cup green frosting or green candy melts
- 1 cup mini marshmallows
- ½ cup green M&Ms or Sixlets
- ¼ cup candy eyeballs
- Black licorice pieces or pretzel sticks (for cauldron ‘spoons’)
- Black cupcake liners or silicone molds (optional, for cauldron effect)
How to Make Bubbling Witch’s Cauldron Brownies
Step 1: Prep Your Cauldrons
Start by preheating your oven according to the directions on your brownie mix box. For the authentic cauldron look, line a muffin tin with black cupcake liners or lightly oil some mini bundt or silicone molds. These “cauldrons” not only add drama, they make serving and decorating easier, too!
Step 2: Mix and Pour the Potion
Prepare your brownie batter just as your mix instructs—don’t be afraid to get a little witchy with a big wooden spoon! Once mixed, carefully dollop the batter into the prepared tins, filling each about two-thirds of the way. This helps ensure your brownies bake up with the perfect shape: gooey in the middle, firm enough to hold all those wild toppings.
Step 3: Bake to Fudgy Perfection
Slide your filled pans into the oven and bake according to package directions for cupcakes—usually around 18 to 22 minutes. You’ll know they’re ready when a toothpick poked in the center emerges with moist crumbs (not raw batter). Let your ‘cauldrons’ cool completely in the tin so they slip out easily, still holding that magical shape.
Step 4: Decorate Your Bubbling Witch’s Cauldron Brownies
This is where things get truly enchanting! Spoon or pipe green frosting (or melted green candy melts) generously on top of each cooled brownie, swirling it to look like a bubbling potion brewing to life. Pile on mini marshmallows to mimic frothy bubbles, then scatter green candies and candy eyeballs for maximum eeriness. Finally, finish with a black licorice stick or pretzel piece as the witch’s spoon, and get ready to cackle with delight!
Step 5: Extra Magic for Squares (Optional)
Don’t have cauldron molds? No need for spellbooks—bake your brownies in a regular pan, cut into squares once cooled, and decorate each in the same spooky style. Your Bubbling Witch’s Cauldron Brownies will still be party-ready and every bit as charming.
How to Serve Bubbling Witch’s Cauldron Brownies

Garnishes
To dial up the enchantment, sprinkle edible glitter, colored sugar, or even shimmery candy pearls over the cauldrons to make each bite shimmer. A dusting of cocoa powder can add depth and drama, while a tiny swirl of extra green frosting gives even more bubbling cauldron effect.
Side Dishes
Bubbling Witch’s Cauldron Brownies pair perfectly with tall glasses of cold milk, generous scoops of vanilla ice cream, or a “Witch’s Brew” punch. Keep the Halloween theme going with bowls of green gummy worms or popcorn tossed with candy corn for a treat table that’s as fun as it is festive.
Creative Ways to Present
Serve your cauldron brownies in a big, theatrical black cauldron bowl lined with paper “smoke” or tucked into a tray surrounded by dry ice for billowing fog. Set up a DIY decorating bar where guests add their own toppings and spoons—the memories are just as sweet as the brownies themselves!
Make Ahead and Storage
Storing Leftovers
These brownies stay fresh and chewy for up to three days when kept in an airtight container at room temperature. If you’ve already added all your toppings, gently layer wax paper between them to prevent sticking and preserve those candy eyeballs from getting squished.
Freezing
Want to save some Bubbling Witch’s Cauldron Brownies for a future midnight snack? Skip the toppings, wrap cooled brownies tightly in plastic wrap, and freeze for up to two months. When you’re ready for another round of potion-making, thaw and decorate to your heart’s content.
Reheating
For maximum fudginess, pop undecorated brownies in the microwave for just 10-15 seconds. If they’re already topped, allow them to come to room temperature on their own to preserve the decorations—no magic wand required!
FAQs
Can I make these brownies from scratch instead of using a box mix?
Absolutely! If you have a favorite homemade brownie recipe, go right ahead and use it in place of the mix. Just be sure to prepare enough to fill your chosen cauldron molds or muffin tin.
What if I can’t find green frosting or candy melts?
If pre-made green frosting is hard to find, simply tint vanilla frosting with a few drops of green gel food coloring. You can also melt white chocolate and stir in color for a homemade take on green “witch’s potion.”
Are there nut-free alternatives for the candies?
Yes! Look for nut-free chocolate-coated candies or use allergy-friendly options like Skittles or sunflower-seed chocolate drops. Always double-check labels if you’re serving kids with allergies.
How far in advance can I assemble the brownies?
You can bake the brownies up to two days in advance and decorate them the same day you plan to serve for the freshest look and texture. If adding marshmallows, wait until the last minute to keep them pillowy and fresh.
Can kids help make Bubbling Witch’s Cauldron Brownies?
Definitely! Kids will love swirling on the green goo, sprinkling on marshmallows and eyes, and jabbing in the witchy spoons. It’s a wildly interactive dessert that brings out everyone’s inner wizard.
Final Thoughts
Whimsical, wickedly delicious, and endlessly customizable, Bubbling Witch’s Cauldron Brownies are more than just dessert—they’re an invitation to create and share a little bit of edible magic. Gather your ingredients, stir up some fun, and watch these treats cast a charm over every guest. Give them a try and let your kitchen become the hottest cauldron on the block!
Print
Bubbling Witch’s Cauldron Brownies Recipe
- Prep Time: 15 minutes
- Cook Time: 20 minutes
- Total Time: 35 minutes
- Yield: 12 cauldron brownies
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Description
These Bubbling Witch’s Cauldron Brownies are a fun and spooky Halloween treat that kids will love decorating. With a cauldron-shaped twist, these brownies are topped with green frosting, marshmallows, candies, and eyeballs to create a bubbling potion effect.
Ingredients
Brownies:
- 1 box brownie mix (plus ingredients listed on the box)
Decoration:
- 1 cup green frosting or green candy melts
- 1 cup mini marshmallows
- ½ cup green M&Ms or Sixlets
- ¼ cup candy eyeballs
- Black licorice pieces or pretzel sticks (for cauldron ‘spoons’)
- Black cupcake liners or silicone molds (optional, for cauldron effect)
Instructions
- Preheat oven: Preheat oven according to the brownie mix instructions.
- Prepare molds: Line muffin tin with black cupcake liners or use greased mini bundt or silicone mold for cauldron shape.
- Make brownies: Prepare brownie batter as directed and fill molds ⅔ full.
- Bake: Bake according to package directions, typically 18–22 minutes.
- Cool: Let brownies cool completely in the pan before removing.
- Decorate: Top cooled brownies with green frosting, marshmallows, candies, and eyeballs. Add licorice or pretzel stick as stirring spoon.
Notes
- You can also bake the brownies in a pan and cut into squares if you don’t have cauldron molds—just decorate each square like a bubbling brew.
- These make a fun Halloween party treat and are great for kids to decorate themselves.
Nutrition
- Serving Size: 1 brownie
- Calories: 250
- Sugar: 22g
- Sodium: 160mg
- Fat: 12g
- Saturated Fat: 4g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 33g
- Fiber: 1g
- Protein: 2g
- Cholesterol: 20mg