Toasted Marshmallow Cold Brew with Vanilla Foam
Why You’ll Love This Recipe
I first tried to make a Toasted Marshmallow Cold Brew with Vanilla Foam on a scorching July afternoon. I was craving that campfire sweetness but needed a cold caffeine kick. My first attempt was a disaster. I burned the marshmallows to a black, bitter crisp and my cold brew was watery. The vanilla foam just collapsed into a sad puddle.
It took me four more tries to get it right. Now, this Toasted Marshmallow Cold Brew with Vanilla Foam is my go to summer afternoon treat. It solves the problem of wanting a rich, dessert like coffee drink without needing a fancy coffee shop. You get a deeply roasted marshmallow flavor that perfectly balances the bold, smooth cold brew. The creamy vanilla foam on top is the final touch. It feels like a luxury drink you made yourself. For more on the science of cold brew coffee extraction, this Wikipedia article explains why it is less acidic and smoother than hot brewed coffee.
Ingredients
- 2 cups cold brew coffee, chilled
- 1/2 cup heavy cream, very cold
- 6 large marshmallows
- 2 tablespoons marshmallow fluff
- 1 teaspoon vanilla extract
- 1 tablespoon maple syrup or simple syrup
- Ice cubes
- Optional: a pinch of sea salt
Step-by-Step Directions
First, get your cold brew ready. I like to use a strong concentrate so the marshmallow sweetness doesn’t drown out the coffee. Pour the 2 cups of cold brew into a tall glass filled with ice. Set that aside for a moment.
Now, for the fun part. Grab a metal skewer or a long fork. Spear one marshmallow at a time. Hold it over the flame of your gas stove. You want a low, steady flame. Rotate the marshmallow constantly. You are looking for a deep, golden brown color with some darker spots. Do not let it catch fire. That black stuff tastes like regret. It takes about 30 to 45 seconds per marshmallow. The smell when it starts to caramelize is incredible. It fills the kitchen with a sweet, toasty aroma. Drop the toasted marshmallows into the bottom of your serving glass. Pour a little of the cold brew over them. The hot marshmallow will start to melt into the coffee. It is a beautiful thing.
While the marshmallows are melting, make the vanilla foam. In a small bowl, combine the very cold heavy cream, the marshmallow fluff, and the vanilla extract. Use a handheld milk frother or a whisk. Froth or whisk vigorously for about 60 seconds. You want the mixture to become thick and airy, like a soft cloud. It should hold soft peaks. If you use a whisk, your arm will get a workout. It is worth it.
Pour the rest of the cold brew into the glass over the melting marshmallows. Stir gently to combine. The toasted marshmallow pieces will mostly dissolve, leaving behind a sweet, smoky flavor. Spoon the vanilla foam generously on top. I like to pile it high. Finish with a drizzle of maple syrup and a tiny pinch of sea salt. The salt makes the sweetness pop.
Pro Tips for Success
Do not skip toasting the marshmallows directly over a flame. A kitchen torch works great, but a gas stove flame is even better. The Maillard reaction that happens on the surface creates that deep, complex flavor you cannot get from just mixing in marshmallow fluff. It is the difference between a good drink and a great one.
Use very cold heavy cream for the foam. If the cream is even slightly warm, it will not whip up properly. It will just stay liquid. I put my bowl and whisk in the freezer for 10 minutes before I start. It makes a huge difference.
Do not over toast the marshmallows. You want a deep amber color, not black. Burnt marshmallows add a bitter, acrid taste that ruins the whole Toasted Marshmallow Cold Brew with Vanilla Foam. If you see black smoke, you have gone too far.
Servings and Timing
This recipe makes one generous serving of Toasted Marshmallow Cold Brew with Vanilla Foam. The active preparation time is about 10 minutes. The total time, including toasting and frothing, is 15 minutes. It is a quick, rewarding project.
Variations and Substitutions
If you want a dairy free version, use full fat oat milk or coconut cream for the foam. Whisk it with the vanilla and a little maple syrup. It will not be as thick as heavy cream, but it will still be delicious. For a stronger coffee flavor, use a dark roast cold brew concentrate. You can also add a shot of espresso to the mix. If you do not have marshmallow fluff, use an extra tablespoon of maple syrup or a little honey in the cream. The texture will be slightly different, but the sweetness will be there. For a fun twist, add a splash of bourbon or whiskey to the cold brew before adding the foam. It makes an excellent adult treat.
What to Serve With This
This drink is amazing on its own, but it pairs beautifully with a sweet snack. Try it alongside a batch of Soft Baked Chocolate Cookies for a double chocolate marshmallow experience. You could also serve it with some Cinnamon Sugar Pretzel Bites. The salty pretzel and the sweet coffee foam are a perfect match.
Storage and Reheating
This drink is best made fresh. The foam will deflate after about 30 minutes. If you have leftover cold brew, you can store it in the fridge for up to a week. Do not store the assembled drink. The toasted marshmallows will harden and the foam will break down. If you want to prep ahead, make the cold brew and store it. Toast the marshmallows and make the foam right before you serve.
FAQs
Can I use store bought cold brew for this Toasted Marshmallow Cold Brew with Vanilla Foam?
Yes, absolutely. Just make sure it is unsweetened or lightly sweetened so you can control the sugar level. A strong concentrate works best.
What happens if I accidentally use hot coffee instead of cold brew?
Hot coffee will melt the foam immediately. You will end up with a warm, sweet coffee drink that is still tasty, but it will not have the layered look or the cold, creamy texture of the original Toasted Marshmallow Cold Brew with Vanilla Foam.
My foam is not getting thick. What did I do wrong?
Your cream was likely not cold enough, or you did not whisk it long enough. Put everything in the freezer for 10 minutes and try again. Also, make sure you are using heavy cream, not half and half. Half and half will not foam.
Can I make this vegan?
You can. Use a strong oat milk cold brew. For the foam, use full fat coconut cream chilled overnight. Whip it with vanilla and maple syrup. It will be lighter than dairy foam but still delicious.
Can I toast the marshmallows in the oven instead?
You can, but it is not the same. The oven toasts them evenly, which misses the charred, smoky spots you get from a direct flame. If you use the oven, broil them on a baking sheet for about 2 minutes. Watch them closely. They burn fast.
Conclusion
Making this Toasted Marshmallow Cold Brew with Vanilla Foam at home feels like a small victory. It is a special treat that does not require a trip to a cafe. I love how the bitter coffee and the sweet, smoky marshmallow balance each other out. The vanilla foam is just pure happiness on top. I hope you try it and love it as much as I do. Let me know how it turns out for you.
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