S’mores Cold Brew Recipe (Starbucks Copycat)

This S’mores Cold Brew brings together smooth coffee, toasted marshmallow, creamy cold foam, chocolate, and graham crackers in one refreshing drink.

The cold brew is sweetened with toasted marshmallow syrup, then topped with a thick layer of marshmallow cold foam. Chocolate sauce and crushed graham crackers finish the drink and give it the full s’mores flavor.

It’s creamy and sweet, but you can easily adjust each part to suit your taste.

Here’s how to make this Starbucks Copycat S’mores Cold Brew at home in just a few easy steps.

Why You’ll Love This S’mores Cold Brew

Cold brew makes a great base for sweet, dessert-inspired coffee drinks because its smooth flavor works well with creamy toppings and flavored syrups.

Toasted marshmallow syrup sweetens the coffee itself, so you get that marshmallow flavor throughout the entire drink rather than only in the topping.

The marshmallow cold foam adds another creamy layer of flavor. It sits on top of the coffee at first and gradually begins to mix with the cold brew as you drink.

Milk chocolate sauce brings in the chocolate element without overpowering the marshmallow flavor, while crushed graham crackers complete the classic s’mores combination.

You also don’t need an espresso machine to make this drink. If your cold brew is already prepared, the entire recipe takes about five minutes from start to finish.

Ingredients You’ll Need

This homemade S’mores Cold Brew has four main flavor components: cold brew coffee, toasted marshmallow syrup, marshmallow cold foam, and the chocolate and graham cracker toppings.

Cold Brew Coffee

You can use homemade cold brew, bottled ready-to-drink cold brew, or cold brew concentrate that has been diluted according to the package directions.

A strong cold brew works best for this recipe. The coffee needs enough flavor to stand up to the sweet syrup and creamy topping, but an especially bitter coffee can overpower the toasted marshmallow flavor.

Pro tip: Make sure the coffee is completely cold before assembling the drink.

Toasted Marshmallow Syrup

Toasted marshmallow syrup is one of the most important ingredients in this recipe. It sweetens both the cold brew and the marshmallow cold foam, creating a consistent flavor from the first sip to the last.

For one drink, I use 1 tablespoon in the cold brew. This gives the coffee noticeable sweetness and marshmallow flavor without completely covering the coffee.

The same syrup is also added to the cold foam.

You can use store-bought toasted marshmallow syrup or homemade syrup.

Regular marshmallow syrup can also work, although toasted marshmallow syrup gives the drink a deeper flavor that better matches classic s’mores.

Heavy Cream and 2% Milk

For the marshmallow cold foam, I use heavy cream and 2% milk.

The heavy cream creates richness and helps the foam thicken, while the milk keeps it light enough to pour over the coffee.

Note: Using heavy cream alone creates a much heavier topping that is closer to softly whipped cream.

For the best results, both ingredients should be very cold before frothing.

Milk Chocolate Sauce

Milk chocolate is the classic choice for s’mores, so a milk chocolate sauce works particularly well here.

You can drizzle the chocolate around the inside of the glass, over the cold foam, or both. I prefer adding some chocolate to the glass and finishing the drink with a small drizzle over the foam.

A little goes a long way. The goal is to add chocolate flavor without covering the toasted marshmallow flavor.

Graham Cracker Crumbs

The graham cracker crumbs are the final part of the s’mores combination.

Crush the graham crackers into relatively fine crumbs before sprinkling them over the cold foam. Large pieces are harder to drink and can quickly sink through the foam.

You only need about a teaspoon for one drink.

How to Make S’mores Cold Brew

This S’mores Cold Brew recipe is easy to assemble, but the order of the steps matters.

Step 1: Make the Marshmallow Cold Foam

Add 3 tablespoons of cold heavy cream, 2 tablespoons of cold 2% milk, and 1 tablespoon of toasted marshmallow syrup to a small glass or measuring cup.

Use a handheld milk frother to froth the mixture until it becomes creamy and thick but is still pourable.

This usually takes around 20 to 30 seconds, although the exact time depends on the strength of your frother.

Pay attention to the consistency rather than frothing for an exact number of seconds. You want the cold foam to sit on top of the coffee while still being fluid enough to slowly sink into the drink.

Pro tip: If you froth it too long and the mixture becomes too thick, add a small splash of milk and gently stir it in.

Set the finished marshmallow cold foam aside while you prepare the cold brew.

Step 2: Sweeten the Cold Brew

Pour 10 ounces of cold brew coffee into the glass.

Add 1 tablespoon of toasted marshmallow syrup and stir thoroughly until the syrup is evenly mixed into the coffee.

It’s best to combine the syrup and coffee before adding the ice. This makes it easier to stir everything together and ensures the drink is evenly flavored.

If you prefer very sweet coffee, you can add slightly more syrup. However, keep in mind that the marshmallow cold foam and chocolate sauce will add additional sweetness.

Step 3: Add Ice

Fill the glass with ice, leaving enough room at the top for the marshmallow cold foam.

The exact amount of ice depends on the size and shape of your glass. I like to use plenty of ice so the drink stays cold as the foam gradually mixes into the coffee.

If possible, use coffee that is already well chilled. Adding room-temperature coffee over ice will cause the ice to melt much faster and dilute the drink.

Step 4: Top With Marshmallow Cold Foam

Slowly pour the marshmallow cold foam over the cold brew.

The foam should create a creamy layer over the darker coffee. Some of it may begin sinking into the drink almost immediately, which is completely normal.

For a more defined layer, pour the foam slowly and close to the surface of the drink rather than pouring it from high above the glass.

Step 5: Add the S’mores Toppings

Drizzle milk chocolate sauce over the marshmallow cold foam.

Finish with about 1 teaspoon of finely crushed graham cracker crumbs.

Serve the S’mores Cold Brew immediately while the foam is thick and the coffee is cold.

You can drink the coffee through the cold foam to get a little of every layer in each sip, or gently stir everything together for a creamier drink.

How to Adjust the Sweetness

The sweetness of this S’mores Cold Brew is easy to adjust.

One tablespoon of toasted marshmallow syrup in 10 ounces of cold brew gives the coffee noticeable sweetness without making it overwhelmingly sweet. However, the ideal amount depends on the cold brew and syrup you use.

If you prefer less-sweet coffee, start with 2 teaspoons of syrup in the cold brew. You’ll still get additional marshmallow flavor from the cold foam.

For a sweeter, more dessert-like drink, use 1½ tablespoons of toasted marshmallow syrup in the coffee and add a little more milk chocolate sauce.

I recommend tasting the coffee base before adding the foam. It should be slightly less sweet than you want the finished drink to be because the toppings will add more sweetness.

Ways to Customize Your S’mores Cold Brew

There are several easy ways to change this recipe while keeping the main s’mores flavor.

For a stronger chocolate flavor, add 1 to 2 teaspoons of milk chocolate sauce directly to the cold brew. Stir it in with the toasted marshmallow syrup before adding the ice.

You can also add more chocolate sauce around the inside of the glass for a richer drink.

For extra marshmallow flavor, add a little more toasted marshmallow syrup to the cold brew rather than increasing the syrup in the cold foam. Too much syrup can make the foam heavy and affect its texture.

If you prefer a creamier coffee base, add a small splash of milk directly to the cold brew before adding the foam.

You can also adjust the amount of graham cracker crumbs. A teaspoon gives the drink noticeable graham cracker flavor without overwhelming the cold foam.

Can You Make S’mores Cold Brew Ahead of Time?

The individual parts can be prepared ahead of time, but I recommend assembling the drink immediately before serving.

Cold brew is convenient for making ahead. Prepare your homemade cold brew in advance and keep it refrigerated, or use a ready-to-drink bottled version.

The heavy cream, milk, and toasted marshmallow syrup can be measured and mixed ahead of time. Store the mixture in a sealed container in the refrigerator and froth it when you’re ready to make your drink.

Graham crackers can also be crushed in advance. Keep the crumbs in an airtight container so they stay crisp.

Once everything is prepared, assembling the drink takes only a few minutes.

I don’t recommend storing an already assembled S’mores Cold Brew. The ice will dilute the coffee, the cold foam will lose its texture, and the graham cracker crumbs will become soft.

Tips for the Best S’mores Cold Brew

Use cold ingredients for both the coffee and cold foam. This keeps the drink colder and helps the foam reach a thicker consistency.

Stir the toasted marshmallow syrup into the cold brew before adding ice so it distributes evenly throughout the drink.

Don’t over-froth the marshmallow cold foam. Stop when it is thick and creamy but still easy to pour.

Use milk chocolate sauce rather than a very dark chocolate sauce if you want a more traditional s’mores flavor. Milk chocolate gives the drink a sweeter, creamier chocolate flavor.

Crush the graham crackers finely. Large pieces can sink quickly and make the drink awkward to sip.

Finally, add the toppings immediately before serving. The graham cracker crumbs will stay crisp longer when they are sprinkled over freshly frothed cold foam.