I can’t get over how this Easy Coffee Swiss Meringue Buttercream turns out so silky, glossy, and rich with café-style flavor. One swirl and every cake, cupcake, or spoonful feels bakery worthy.

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I’m obsessed with this Easy Coffee Swiss Meringue Buttercream because it tastes like the fancy frosting I want on every chocolate cake, cupcake, and spoon I can justify. The coffee flavor is bold but not bitter, silky but not heavy, and it cuts through sweetness in the best way.

I love how unsalted butter gives it that smooth, rich finish, while instant espresso powder brings the deep café punch. And yes, I sneak tastes straight from the bowl.

But the real magic is the texture. Glossy, creamy, and ridiculously plush.

The kind of frosting that makes a cake feel expensive.

Ingredients

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Egg whites make the frosting silky, light, and stable without tasting eggy.
Granulated sugar melts in, giving sweetness and that glossy bakery-style finish.
Unsalted butter brings the creamy body, rich flavor, and smooth pipeable texture.
Vanilla rounds everything out so the coffee doesn’t taste too sharp.
Instant espresso powder gives bold coffee flavor without watering down the buttercream.
Strong brewed espresso works too, but it’ll give a softer coffee vibe.
Fine salt keeps the sweetness in check and makes the coffee flavor pop.
Confectioners sugar is optional, but it helps if your kitchen runs warm.
Plus, it adds a little extra sweetness if you like a sturdier frosting.
Basically, this buttercream tastes fancy but still feels cozy and fun.

Ingredient Quantities

4 large egg whites (about 120 g)

1 cup granulated sugar (200 g)

1 1/2 cups unsalted butter, softened and cut into pieces (340 g)

1 teaspoon pure vanilla extract

1 to 2 tablespoons instant espresso powder OR 2 tablespoons strong brewed espresso

Pinch fine salt

2 to 4 tablespoons confectioners sugar, optional, for extra stability (30 to 60 g)

How to Make this

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1. Combine 4 large egg whites and 1 cup (200 g) granulated sugar in a heatproof bowl set over a saucepan of simmering water, whisking constantly until the sugar is fully dissolved and the mixture reaches about 160°F (70°C) or feels smooth between your fingers.

2. Remove the bowl from the heat and transfer the warm egg white mixture to the bowl of a stand mixer fitted with the whisk attachment or to a large mixing bowl if using a hand mixer.

3. Whip on medium-high speed until the meringue is glossy and forms stiff peaks and the bowl feels close to room temperature, about 8 to 12 minutes.

4. With the mixer on low, add the 1 1/2 cups (340 g) softened unsalted butter, a few pieces at a time, allowing each addition to incorporate before adding more; once most butter is added, raise speed to medium and continue to beat until smooth.

5. Stir in 1 teaspoon pure vanilla extract, a pinch of fine salt, and 1 to 2 tablespoons instant espresso powder OR 2 tablespoons strong brewed espresso (if using brewed espresso, make sure it is cooled) and beat until fully incorporated.

6. If the buttercream looks thin or slightly separated, continue beating on medium speed; chilling the bowl for 10 to 15 minutes and then beating again can help it come together.

7. For extra stability or a firmer finish, sift in 2 to 4 tablespoons (30 to 60 g) confectioners sugar and beat until smooth and even in texture.

8. Taste and adjust coffee or vanilla levels if desired, then use immediately to frost cakes or cupcakes, or store in an airtight container in the refrigerator for up to 5 days; bring to room temperature and re-whip briefly before using.

Equipment Needed

1. Heatproof mixing bowl
2. Saucepan for simmering water
3. Whisk
4. Instant read thermometer or sugar thermometer
5. Stand mixer with whisk attachment or electric hand mixer
6. Rubber spatula
7. Sifter or fine mesh sieve
8. Measuring cups and spoons
9. Airtight container for storage

FAQ

Q: Can I use instant espresso powder or brewed espresso Which is better
A: Both work. Instant espresso gives concentrated flavor without extra liquid. If using brewed espresso use 1 to 2 tablespoons and cool it first so you do not melt the butter.

Q: Do the egg whites need to be cooked Is this safe
A: Yes the whites are gently cooked with sugar over simmering water until warm and sugar dissolves which pasteurizes them. Whip until the meringue is cool to the touch for safe, stable buttercream.

Q: My buttercream split or looks curdled How do I fix it
A: If it looks curdled, keep whipping on medium speed until smooth and glossy; chilling briefly then whipping again can help. If too warm add a few minutes in the fridge, if too cold let it soften slightly at room temperature and rewhip.

Q: How long can I store this buttercream
A: Refrigerated in an airtight container it keeps 5 to 7 days. Freeze for up to 2 months. Bring to room temperature and rewhip before using.

Q: Can I color or add other flavors
A: Yes use gel or paste food coloring and fold or whip in. For other flavors use extracts, liqueurs or concentrated pastes but add sparingly so the buttercream does not become too soft.

Q: Should I add confectioners sugar What does it do
A: Confectioners sugar is optional. Adding 2 to 4 tablespoons can help stabilize the buttercream and slightly sweeten it without changing texture much.

Easy Coffee Swiss Meringue Buttercream Recipe Substitutions and Variations

4 large egg whites: substitute aquafaba (chickpea brine), about 3 tablespoons aquafaba per egg white (whip the same way, may take a little longer to reach glossy peaks).
1 cup granulated sugar: substitute superfine or caster sugar (dissolves faster for a silkier meringue) or use equal weight of organic cane sugar if preferred.
1 1/2 cups unsalted butter: substitute a high quality vegan stick butter or refined vegetable shortening for a dairy free or more stable buttercream (use the same weight and ensure it is softened).
1 to 2 tablespoons instant espresso powder: substitute 2 tablespoons very strong brewed coffee, or 1/2 to 1 teaspoon coffee extract for a more concentrated flavor without extra liquid.

Pro Tips

1. Make sure the sugar is fully dissolved when heating the egg whites; if you rub a little between your fingers, it should feel smooth and not grainy. Any undissolved sugar will give a gritty buttercream and make whipping take longer.

2. Use butter that is soft but still slightly cool to the touch. If it is too warm the buttercream will be greasy and may separate; if it is too cold it will not incorporate smoothly. Add the butter in small pieces and give each addition time to blend before adding more.

3. If the meringue looks deflated or the buttercream appears curdled, be patient and keep beating at medium speed. Chilling the bowl for 10 to 15 minutes, then rewhipping often brings it back to a satiny, smooth texture.

4. When using brewed espresso, cool it completely and add it sparingly. Liquid can thin the buttercream quickly; instant espresso gives stronger coffee flavor with less moisture, so start with the lower amount and taste as you go.

5. For clean piping and stable decorations, fold in 2 to 4 tablespoons confectioners sugar to firm up the buttercream slightly. Store leftovers in an airtight container in the fridge and re-whip briefly at room temperature before using.

Easy Coffee Swiss Meringue Buttercream Recipe

Recipe by Pho Tsventichi

0.0 from 0 votes

I can’t get over how this Easy Coffee Swiss Meringue Buttercream turns out so silky, glossy, and rich with café-style flavor. One swirl and every cake, cupcake, or spoonful feels bakery worthy.

Servings

servings

Calories

290

kcal

Equipment: 1. Heatproof mixing bowl
2. Saucepan for simmering water
3. Whisk
4. Instant read thermometer or sugar thermometer
5. Stand mixer with whisk attachment or electric hand mixer
6. Rubber spatula
7. Sifter or fine mesh sieve
8. Measuring cups and spoons
9. Airtight container for storage

Ingredients

4 large egg whites (about 120 g)
1 cup granulated sugar (200 g)
1 1/2 cups unsalted butter, softened and cut into pieces (340 g)
1 teaspoon pure vanilla extract
1 to 2 tablespoons instant espresso powder OR 2 tablespoons strong brewed espresso
Pinch fine salt
2 to 4 tablespoons confectioners sugar, optional, for extra stability (30 to 60 g)

Directions

Combine 4 large egg whites and 1 cup (200 g) granulated sugar in a heatproof bowl set over a saucepan of simmering water, whisking constantly until the sugar is fully dissolved and the mixture reaches about 160°F (70°C) or feels smooth between your fingers.
Remove the bowl from the heat and transfer the warm egg white mixture to the bowl of a stand mixer fitted with the whisk attachment or to a large mixing bowl if using a hand mixer.
Whip on medium-high speed until the meringue is glossy and forms stiff peaks and the bowl feels close to room temperature, about 8 to 12 minutes.
With the mixer on low, add the 1 1/2 cups (340 g) softened unsalted butter, a few pieces at a time, allowing each addition to incorporate before adding more; once most butter is added, raise speed to medium and continue to beat until smooth.
Stir in 1 teaspoon pure vanilla extract, a pinch of fine salt, and 1 to 2 tablespoons instant espresso powder OR 2 tablespoons strong brewed espresso (if using brewed espresso, make sure it is cooled) and beat until fully incorporated.
If the buttercream looks thin or slightly separated, continue beating on medium speed; chilling the bowl for 10 to 15 minutes and then beating again can help it come together.
For extra stability or a firmer finish, sift in 2 to 4 tablespoons (30 to 60 g) confectioners sugar and beat until smooth and even in texture.
Taste and adjust coffee or vanilla levels if desired, then use immediately to frost cakes or cupcakes, or store in an airtight container in the refrigerator for up to 5 days; bring to room temperature and re-whip briefly before using.

Notes

Below you’ll find my best estimate of this recipe’s nutrition facts. Treat the numbers as a guide rather than a rule—great food should nourish both body and spirit. Figures are approximate, and the website owner assumes no liability for any inaccuracies in this recipe.