How to Make Coffee Marshmallows at Home

Store-bought marshmallows taste mostly of sugar. Homemade ones are softer, bouncier and can taste of anything you like, and coffee is one of the best flavors for them. If you want to know how to make coffee marshmallows, the method is simpler than it looks: bloom gelatin in cold coffee, boil a sugar syrup to 240°F (115°C), and whip the two together until thick and glossy. After a few hours in the pan, you cut them into squares.

Drop one into hot chocolate, toast one over a flame, or sandwich one in a s’more for a grown-up campfire treat.

Ingredients

Makes about 36 marshmallows (1½ inch / 4 cm squares) in a 9 x 9 inch (23 x 23 cm) pan.

Equipment: a stand mixer with whisk (or a sturdy hand mixer and patience), a candy thermometer, a medium heavy saucepan, a 9 x 9 inch pan and an oiled spatula.

How to make coffee marshmallows, step by step

1. Prepare the pan. Mix the powdered sugar and cornstarch. Lightly oil the pan, then dust it generously with some of the mixture. Keep the rest for later.
2. Bloom the gelatin. Stir the instant coffee into the cold coffee until dissolved. Pour it into the mixer bowl and sprinkle the gelatin evenly over the top. Leave it to soak while you make the syrup.
3. Make the syrup. In the saucepan, combine sugar, corn syrup, water and salt. Stir over medium heat until the sugar dissolves, then stop stirring.
4. Boil to 240°F (115°C). Clip on the thermometer and boil until the syrup reaches 240°F, the soft-ball stage. This usually takes 8 to 10 minutes. Take it off the heat right away.
5. Combine. With the mixer on low, slowly pour the hot syrup down the side of the bowl into the gelatin. Avoid the whisk, which would spray hot syrup.
6. Whip. Increase to high and whip for 10 to 12 minutes, until the mixture is thick, glossy, pale coffee-colored and lukewarm. Add the vanilla in the last minute.
7. Spread. Scrape the mixture into the pan with the oiled spatula and smooth the top. Work fast; it sets quickly.
8. Set. Dust the top with more of the sugar-starch mix. Leave uncovered at room temperature for at least 4 hours, or overnight.
9. Cut. Turn the slab out onto a dusted board. Cut with an oiled knife or pizza cutter, then toss every piece in the remaining dusting mix so the sticky sides are coated.

Tips for the best texture

• Use a thermometer. Syrup taken too low gives soft, sticky marshmallows; too high gives chewy, dense ones.
• Cold coffee only for the bloom. Hot coffee would dissolve the gelatin unevenly before the syrup goes in.
• Do not skip the long whip. The volume comes from whipping air into the cooling mixture.
• Stronger flavor: add up to 1 more tablespoon of instant coffee to the bloom, or a teaspoon of finely ground espresso to the dusting mix.

Variations

Can you make vegan coffee marshmallows?

Classic marshmallows rely on gelatin, which is an animal product. Vegan marshmallows use plant-based gelling agents such as agar, but agar sets differently and needs its own tested recipe. Simply swapping it into this recipe will not give the same bounce.

A quick history of the marshmallow

The name comes from a real plant. The marsh mallow (Althaea officinalis) grows in wetlands across parts of Europe, North Africa and Asia, and its root was used in ancient times in sweetened preparations for sore throats. In 19th-century France, confectioners made pâte de guimauve, a spongy candy whipped from dried mallow root, sugar, water and egg whites, which took a day or two to make.

In the late 19th century, candy makers began replacing mallow root with gelatin, which produced a more stable marshmallow, and by the early 20th century, marshmallows were being sold in tins in the US as penny candy. Today’s cylindrical store-bought marshmallows are made by extrusion, a process developed in the early 1950s. Your homemade version, whipped and cut by hand, is much closer to the old French confection in spirit.

How to use coffee marshmallows

• In hot chocolate or a mocha: drop two on top and let them melt into a coffee-flavored foam.
• Toasted: a kitchen torch or gas flame caramelizes the outside quickly.
• Coffee s’mores: sandwich a toasted square with dark chocolate between graham crackers.
• Gifts: pack in a jar with a bag of coffee for a thoughtful homemade present.

Coffee to brew and pair

For the bloom, a strong cold brew gives smooth, chocolatey coffee flavor; our guide to how to make cold brew shows how, or use our Instant Coffee dissolved in cold water for speed. To serve alongside, our S’mores flavored coffee has toasted marshmallow, graham cracker and milk chocolate notes, and Peppermint Mocha pairs perfectly with the peppermint mocha variation. For more ideas, see our guide to coffee and chocolate pairing.

Troubleshooting

• Mixture did not get fluffy: whip longer; it needs to cool while whipping. Check the syrup reached 240°F.
• Marshmallows are too sticky: use more dusting mix on every cut side, and store in an airtight container.
• Grainy texture: sugar crystals formed in the syrup. Stop stirring once it boils and brush down the sides with a wet pastry brush.
• Weak coffee flavor: use cold brew concentrate and add the extra instant coffee.

Coffee marshmallows FAQ

How long do homemade marshmallows last?

Kept in an airtight container at room temperature, they stay at their best for about one to two weeks.

Can I make marshmallows without corn syrup?

Yes, some recipes use honey or golden syrup instead. The flavor changes and the texture can be slightly softer.

Do coffee marshmallows contain caffeine?

A little. The coffee is spread across about 36 pieces, so each one contains only a small amount. Use decaf if you are serving children or want to avoid caffeine entirely.

Can I use espresso instead of cold brew?

Yes. Pull two or three shots, chill them completely and top up with cold water to ½ cup (120 ml).

Sources

1. Marshmallow. Wikipedia. en.wikipedia.org

Facts checked in October 2026.

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