Hot Chocolate Bombs with marshmallows are a delightful, interactive treat that kids love to help make—and to watch “explode” into a mug of hot cocoa. Once you try making them, you may find yourself hooked. The process is simpler than it looks, and with a little practice you’ll be able to make beautiful, festive bombs in no time.
These cocoa bombs make charming gifts—package a few in a cello bag or small bakery box for a quick homemade present. They also work well as stocking stuffers or additions to edible gift baskets. By changing decorations you can adapt them for any season: fall, winter, spring, or even a cool summer morning by the campfire.
To make them holiday-specific, simply switch sprinkle colors and piping accents, or use colored marshmallows. The decoration possibilities are nearly endless and let you tailor the recipe to any celebration or personal preference.
What You Need
Chocolate – melting chocolate for the outer shell. Milk, dark, or white chocolate all work; choose a good-quality chocolate in chips, wafers, or bark for best results.
Cocoa mix – use your favorite instant hot cocoa mix or a homemade blend.
Marshmallows – use mini or dehydrated mini marshmallows so they fit comfortably inside the shell.
You’ll also need a dome- or sphere-shaped silicone mold sized so the finished bomb will fit into a mug. A small food-grade paintbrush helps spread melted chocolate evenly in the molds.
How to Make Hot Chocolate Bombs with Marshmallows
1. Melt the chocolate in a double boiler or the microwave. If using the microwave, heat in short bursts (about 15 seconds), stirring between intervals until smooth.
2. Spoon a small amount of melted chocolate into each mold cavity. Using a paintbrush or the back of a spoon, spread the chocolate evenly up the sides and all the way to the top edge.
3. Allow the chocolate to set, then repeat the coating process 2–3 more times so the shell is sturdy. Refrigerate until fully hardened, about 30 minutes.
4. Gently remove the hardened halves from the mold. Fill half of the shells with about 1 tablespoon of hot cocoa mix and a small pinch of mini or dehydrated marshmallows.
5. To seal, warm a microwave-safe plate for 30–60 seconds so it’s just warm. Place an empty half (flat side down) on the plate briefly to soften the edge, then quickly place it on top of a filled half. Press gently to seal and smooth any seams with a fingertip dipped in melted chocolate.
6. To serve, place a hot chocolate bomb in a mug and pour 1 cup of warm milk over it. The heat will melt the shell and release the cocoa mix and marshmallows into the drink.
Decorating Cocoa Bombs
Decorate after assembling so the toppings stick. For sprinkles, dip the finished bomb into additional melted chocolate, then immediately add sprinkles while the chocolate is still wet. To pipe chocolate or icing, use a piping bag or a zip-top bag with a corner snipped off and drizzle as desired.
Decoration ideas
- Chopped nuts
- Cookie crumbs
- Chocolate shavings
- Crushed candy or peppermint chunks
Seasonal gift ideas
These make lovely gifts paired with a mug or included in a hot cocoa bar. Wrap individually in cello bags with a ribbon and attach a brief use instruction card.
Holiday decoration suggestions
- Spring/Easter: pastel marshmallows and light-colored sprinkles
- Halloween/Fall: themed sprinkles or crushed pretzels for texture
- New Year: metallic or gold sprinkles and edible shimmer
- Christmas: red and green accents
- Hanukkah: blue, silver, and gold accents
No-Bake Treats You Might Enjoy
- Oreo Chocolate Lasagna
- Chocolate-Covered Cookie Dough Balls
- S’mores Rice Krispie Treats
Recipe Summary
Prep time: 30 minutes (plus chilling)
Total time: About 1 hour
Yields: 3 chocolate bombs
Calories (estimate): 336 kcal per bomb
Ingredients
- 12 ounces melting chocolate (milk, dark, or white)
- 1/2 cup mini marshmallows (or dehydrated mini marshmallows)
- 3 tablespoons instant hot cocoa mix
Instructions
- Melt chocolate in a double boiler or microwave, stirring frequently until smooth.
- Spoon melted chocolate into silicone molds and brush evenly to coat sides and edges.
- Let set, then repeat 2–3 more layers for a sturdy shell. Refrigerate until fully hardened (about 30 minutes).
- Remove halves from molds and fill half the shells with cocoa mix and marshmallows.
- Warm a plate briefly, soften the edge of an empty half on the plate, then place it onto a filled half to seal. Smooth seams with a fingertip dipped in melted chocolate.
- To serve, place a bomb in a mug and pour 1 cup of warm milk over it to melt and reveal the cocoa and marshmallows.
Notes
- Avoid overheating chocolate to prevent seizing.
- Dehydrated mini marshmallows work well if storage or fit is a concern.
- Optional decorations: crushed candy canes, chopped Andes pieces, or colored sprinkles.
- Store bombs in an airtight container in a cool, dry place away from heat.
- Nutritional values are estimates and will vary by ingredients and decorations used.
If you try this recipe, consider leaving a rating or comment. Tag creations with #areinventedmom—we love seeing your versions!