Name: Swiss Meringue Buttercream
Prep time: 20 min
Cook time: 10 min
Total time: 30 min
Yield: 5
Cuisine: American
Ingredients: 5 large Egg Whites (approx. 150 g / 5.3 oz), at room temperature; 1 ½ cups (300 g) Granulated Sugar; 2 cups (454 g / 1 lb) Unsalted Butter, softened but still cool to the touch and cut into cubes; 2 tsp (10 ml) Pure Vanilla Extract; ¼ tsp (1.5 g) Salt

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If you’ve been looking for the “goldilocks” of frostings—not too sweet, perfectly stable, and incredibly buttery—you’ve officially found it! This Swiss Meringue Buttercream is the sophisticated cousin of classic American buttercream. It has a dreamy, marshmallow-like texture that glides onto cakes like a total dream, making those professional smooth edges finally feel achievable at home.

I remember the first time I tried making this; I was so nervous about the egg whites, but I promise it is much easier than it sounds! Whether you are frosting a towering birthday cake or piping delicate swirls onto cupcakes, this Swiss Meringue Buttercream holds its shape beautifully even in warmer weather. It’s light, airy, and tastes like a cloud of vanilla heaven.

This recipe is my absolute go-to because it’s remarkably versatile and less sugary than other frostings. You only need a few simple ingredients and a little bit of patience to whip up the most luxurious batch of Swiss Meringue Buttercream you’ve ever tasted. Your friends and family will definitely think you bought it from a high-end bakery!

A vanilla cupcake topped with a high swirl of silky white Swiss Meringue Buttercream and rainbow sprinkles.

More Frosting Recipes

INGREDIENTS

5 large Egg Whites (approx. 150 g / 5.3 oz), at room temperature
1 ½ cups (300 g) Granulated Sugar
2 cups (454 g / 1 lb) Unsalted Butter, softened but still cool to the touch and cut into cubes
2 tsp (10 ml) Pure Vanilla Extract
¼ tsp (1.5 g) Salt
Optional: Gel food coloring (if you want a pop of color!)
Optional: 2 tbsp (30 ml) Fruit puree or melted (and cooled) chocolate for flavor variations

INSTRUCTIONS

Whisk the Egg Whites and Sugar: Fill a medium saucepan with about 1 inch (2.5 cm) of water and bring it to a gentle simmer. Place your clean stand mixer bowl over the pot (making sure the bottom doesn’t touch the water). Combine the egg whites and granulated sugar in the bowl. Whisk constantly until the mixture reaches 160°F (71°C) and the sugar granules have completely dissolved.
Whip the Meringue: Move the bowl to your stand mixer fitted with the whisk attachment. Start on low speed and gradually increase to medium-high. Whip the mixture until stiff, glossy peaks form and the outside of the bowl feels completely cool to the touch. This usually takes about 10–15 minutes.
Add the Butter: Switch to the paddle attachment. With the mixer on medium-low, add the cubed butter one piece at a time. Ensure each piece incorporates before adding the next.
Keep Mixing: Don’t panic if the mixture looks curdled or soupy halfway through! This is totally normal. Keep mixing on medium speed, and it will suddenly transform into a thick, smooth Swiss Meringue Buttercream.
Flavor and Smooth: Once the buttercream is smooth, add the vanilla extract and salt. Turn the mixer to the lowest speed and let it run for 2–3 minutes. This removes any large air bubbles, leaving you with a silky finish that’s perfect for piping.

Pro Tip: If your meringue is still warm when you start adding butter, the butter will melt. If this happens, pop the whole bowl in the fridge for 15 minutes, then try whipping it again!

A glass mixing bowl filled with smooth, fluffy Swiss Meringue Buttercream being swirled with a spatula.

A close-up shot of a spatula holding a dollop of thick and stable Swiss Meringue Buttercream to show consistency.

TIPS & VARIATIONS

Cooking Tips for Success

The Squeaky Clean Rule: Ensure your mixer bowl and whisk are completely grease-free. Wipe them down with a paper towel dipped in a little lemon juice or white vinegar before starting. Any trace of fat will prevent your egg whites from whipping into beautiful peaks.
Patience is Key: If the buttercream looks like cottage cheese while you’re adding the butter, keep mixing! It almost always goes through an “ugly phase” before it becomes silky.
Temperature Control: If the frosting stays soupy, the mixture is too warm. Chill the bowl for 15–20 minutes and whip again. If it’s curdled and cold, take a small cup of the buttercream, microwave it for 5–10 seconds until melted, and pour it back into the mixer while whipping to warm things up.

Delicious Variations

Chocolate: Fold in ½ cup (90 g) of high-quality melted and cooled semi-sweet chocolate once the buttercream is smooth.
Salted Caramel: Swirl in ¼ cup (60 ml) of room-temperature salted caramel sauce for a decadent twist.
Berry Bliss: Mix in 3 tbsp (45 ml) of a concentrated strawberry or raspberry reduction (strained of seeds) for a natural pink hue and fruity punch.

Storage & Make-Ahead

Fridge: Store in an airtight container for up to 1 week. Bring it to room temperature and re-whip with the paddle attachment before using.
Freezer: You can freeze Swiss Meringue Buttercream for up to 2 months. Thaw overnight in the fridge, then follow the room-temperature re-whipping process.

SERVING IDEAS

Swiss Meringue Buttercream is truly the crown jewel of cake decorating. Because it is so silky and stable, it’s the best choice for achieving those crisp, sharp edges on a layer cake that look like they came straight from a professional bakery.

How to Serve

The Perfect Pipe: Use this buttercream for intricate floral piping. It holds detail much better than whipped cream and doesn’t crust over like American buttercream, giving you a beautiful, soft sheen.
Cupcake Swirls: Use a large star tip to create high, bakery-style swirls. Top them with fresh berries or a sprinkle of sea salt to balance the buttery richness.

Pairings

Classic Vanilla or Rich Chocolate Cake: This frosting is the perfect companion to a dense chocolate sponge or a light, airy vanilla bean cake.
Fruit Fillings: Since it isn’t overly sweet, it pairs beautifully with tart lemon curd, fresh raspberries, or a bright passionfruit filling tucked between cake layers.
With a Warm Drink: A slice of cake topped with this buttercream is heaven alongside a hot cup of coffee or a delicate Earl Grey tea.

Occasion-Based Ideas

Wedding & Celebration Cakes: Because it’s stable and looks so elegant, it’s the standard for weddings and big milestones.
Summer Garden Parties: It handles slightly warmer temperatures better than many other frostings, making it a great pick for outdoor gatherings.
Holiday Treats: Add a touch of peppermint or almond extract for festive Christmas cupcakes that look like snowy peaks!

FAQs

How long can Swiss Meringue Buttercream sit out? Since the egg whites are cooked to 160°F (71°C), they are pasteurized and safe! You can leave a frosted cake out at room temperature for up to 2 days, provided your kitchen isn’t too hot. If it’s a very warm day, it’s always safer to keep it in the fridge.

Why does my buttercream taste like a stick of butter? Because Swiss Meringue Buttercream is butter-based, it will have a rich, buttery flavor! However, if it feels too heavy, ensure you’ve whipped the meringue to full, stiff peaks before adding the butter, and don’t skip the salt and vanilla—they are crucial for balancing that richness.

Can I make this without a stand mixer? You can use a hand mixer, but be prepared for a workout! You’ll be mixing for 15–20 minutes at a time. A stand mixer is definitely the hero of this recipe because it allows for the constant, high-speed whipping needed to get that airy volume.

Can I use carton egg whites? I recommend using fresh egg whites for the best results. Some brands of carton egg whites are pasteurized in a way that prevents them from whipping up into a stable meringue. If you’re in a pinch, check the carton to ensure it specifically says they are suitable for meringue!

My buttercream is yellow—how do I make it white? Natural butter has a yellow tint, which carries over to the frosting. To neutralize it, add the tiniest drop of purple gel food coloring on a toothpick. The purple cancels out the yellow, leaving you with a bright, clean white!

Can I use this under fondant? Yes! Once chilled, this buttercream becomes very firm, making it an excellent stable base for draping fondant.

Recipe

Yield: Makes about 5 cups

Swiss Meringue Buttercream

A luxuriously silky, cloud-like frosting that is perfectly balanced and not too sweet. Ideal for professional cake decorating and intricate piping.

Prep Time: 20 minutes

Cook Time: 10 minutes

Total Time: 30 minutes

Ingredients

5 large Egg Whites (approx. 150 g / 5.3 oz), at room temperature
1 ½ cups (300 g) Granulated Sugar
2 cups (454 g / 1 lb) Unsalted Butter, softened but still cool to the touch and cut into cubes
2 tsp (10 ml) Pure Vanilla Extract
¼ tsp (1.5 g) Salt

Instructions

Heat the Meringue Base: Place egg whites and sugar in a clean, heat-proof bowl. Set the bowl over a saucepan with 1 inch (2.5 cm) of simmering water. Whisk constantly until the mixture reachs 160°F (71°C) and the sugar is completely dissolved.
Whip to Stiff Peaks: Transfer the bowl to a stand mixer. Using the whisk attachment, whip on medium-high speed until the meringue is stiff, glossy, and the bowl is completely cool to the touch (about 10–15 minutes).
Incorporate Butter: Switch to the paddle attachment. On medium-low speed, add the cubed butter one piece at a time, allowing each to incorporate.
Emulsify: Continue mixing through the "curdled" stage until the Swiss Meringue Buttercream becomes thick and smooth.
Final Smooth: Add vanilla and salt. Mix on the lowest speed for 2–3 minutes to remove air bubbles for a silky finish.

Notes

Temperature Tip: If the buttercream is too soft, chill the bowl for 15 minutes and re-whip.

Cleanliness: Ensure all tools are completely grease-free to allow the egg whites to whip properly.

Flavoring: Add melted chocolate or fruit reductions only after the buttercream has fully emulsified.

Nutrition Information:

Yield: 24 Serving Size: 2 tbsp
Amount Per Serving: Calories: 195Total Fat: 16gCarbohydrates: 13gProtein: 1g

Nutrition information is estimated and may vary based on ingredients used.

I am so excited for you to try this Swiss Meringue Buttercream! Once you experience that first silky, melt-on-your-tongue bite, you’ll understand why it’s the favorite of professional bakers everywhere. It truly elevates any cake or cupcake from “homemade” to “high-end boutique.” Don’t be intimidated by the process—just take it one step at a time, and I promise the results are so worth it!

If you enjoyed making this recipe, please save it to your favorite Baking or Cake Decorating board on Pinterest so you can find it whenever the craving for a perfect cake strikes! I’d also love to hear how your baking project turned out, so feel free to leave a comment or share your beautiful creations with me.

Happy baking, and enjoy every buttery, silky bite of your Swiss Meringue Buttercream!