Italian Meringue Buttercream for Filling and Decorating

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As a professional cake decorator for over 10 years, Italian Meringue Buttercream is my go-to frosting for cakes and cupcakes. It’s smooth, not too sweet, and easy to work with.

When I first started baking, I used American Buttercream. It’s simple and popular, but I always found it too sweet, and I didn’t love how it would crust. After that, I tried Swiss Meringue Buttercream. It seemed less intimidating since you don’t have to pour hot sugar syrup into the mixer, but I sometimes ended up with a grainy texture, which made it tricky to get consistent results.

Eventually, I tried Italian Meringue Buttercream and I haven’t looked back since. It’s silky, stable, and has just the right sweetness. It’s my favorite for decorating and eating, and my cake customers always ask for it.

I adapted this recipe from the Preppy Kitchen version to make it my own.

If you love this recipe, check out some of my other frosting and filling recipes, like my cookies and cream filling, cannoli filling, or my Peanut Butter Marshmallow Buttercream Frosting Recipe next. Or if you want a high-protein option, check out my Protein Cream Cheese Yogurt Frosting – it’s a reader fav!

Looking for a vegan option? I got you. Check out my Healthy Vegan Cake Frosting – it’s cashew based and naturally sweetened.

Key Ingredient Notes and Substitutions:

4 large egg whites: Provide structure and stability to the buttercream.
1 1/4 cups granulated sugar (250g), plus additional 1/4 cup (55g) for adding to egg whites: Sweetens the buttercream and helps stabilize the egg whites.
¼ teaspoon salt: Enhances the flavor. Omit if using salted butter.
16 ounces unsalted butter (454g): Adds richness and creaminess.
1 teaspoon clear vanilla extract (4.9mL): Adds flavor without altering the color.
¼ teaspoon cream of tartar (0.84g): Stabilizes the egg whites and helps them whip to soft peaks.
⅓ cup + 1 tbsp water (95g): Used to create the sugar syrup.
Drop of violet gel food color: Optional, helps achieve a pure white color.

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Supplies

Stand Mixer with whisk attachment
Medium pot
Candy or meat thermometer (essential for accurate sugar syrup)
Measuring cups and spoons
Spatula
Toothpick (for adding food color if using)

Step by Step Instructions

Whip the Egg Whites: In a stand mixer mixing bowl, beat the egg whites, salt, and cream of tartar on medium-high speed until soft peaks form.
Prepare the Sugar Syrup: While the eggs are whipping, combine 1 1/4 cups of sugar and ⅓ cup + 1tbsp of water in a medium pot over medium heat. Maintain medium heat until the sugar temperature reaches 235-240°F. Use a thermometer to ensure accuracy.
Add Sugar to Egg Whites: Slowly add the remaining 1/4 cup of sugar into the egg whites while beating until soft peaks form.
Combine Syrup and Meringue: Once the sugar syrup reaches 235-240°F, drizzle it into the mixer immediately. The meringue should be at the soft peak stage at this point. Continue running the mixer until the meringue is cool/tepid.
Add Butter: Gradually add the room temperature butter into the running mixer, a little at a time, until fully combined and the mixture has reached a silky consistency.
Finish with Vanilla and Color: Add the salt and vanilla extract, and beat until fully incorporated. To get a pure white color, add a small drop of violet gel food color and mix until well blended.

Understanding Different Types of Buttercream: American, Swiss, and Italian

When it comes to frosting your cakes and cupcakes, choosing the right type of buttercream can make all the difference. Buttercream comes in various forms, each with its unique texture, flavor, and preparation method. Here, we’ll explore the three most popular types: American, Swiss, and Italian Meringue Buttercream.

American Buttercream is the simplest to make, consisting of butter and powdered sugar, sometimes with added milk or cream for consistency. It’s sweet and has a crusting texture, making it a great recipe to start with for simple cake decorating. Try my Easy American Buttercream Recipe.

Swiss Meringue Buttercream involves heating egg whites and sugar together before whipping them into a meringue, then adding butter. It has a smooth and silky texture but can be a bit temperamental, requiring precise temperature control.

Italian Meringue Buttercream is made by whipping egg whites to soft peaks and then gradually adding a hot sugar syrup, followed by butter. This method creates a stable and less sweet buttercream that stays silky, making it my favorite for both decorating and eating.

Each type has its unique qualities, so choosing the right one depends on your preference and the specific needs of your baking project.

Frequently Asked Questions

Can I use carton egg whites instead of fresh?

Honestly, I always use carton egg whites with great results although I know some experts frown upon it. Just ensure they are pure egg whites without additives.

Can I use salted butter?

Yes, but omit the additional salt in the recipe to avoid over-salting the buttercream.

What should I do if my buttercream is grainy?

Grainy buttercream can result from the sugar not dissolving properly. Warm the mixture slightly and beat it again until smooth.

How can I add different flavors?

You can add various extracts such as almond, lemon, or peppermint. Start with a small amount and adjust to taste.

How do I store Italian Meringue Buttercream?

Store in an airtight container in the refrigerator for up to one week or freeze for up to three months. To maintain the consistency, it is important to bring it to room temperature and re-whip before using. If you find it breaks when you start whipping, remove 1/3 and microwave it for 15-30 seconds or heat it slowly using the double boil method (place the bowl over a pot of boiling water) and add this back into the buttercream while whipping and it should come back together.

cupcakes with white buttercream and berries

Trish’s Tips for Success

Temperature Control: Using a thermometer is crucial to achieving the perfect sugar syrup consistency. I recommend a thermometer with a long cable that connects the probe to the base to avoid dropping into the hot sugar mixture like this one.

Troubleshooting Italian Meringue Buttercream

Grainy Texture: If your buttercream turns out grainy, it’s usually because the sugar didn’t dissolve properly. Try warming the mixture slightly and beating it again until smooth. Patience is key here!
Curdled Buttercream: Sometimes, the buttercream can look curdled or separated. This often happens if the butter is too cold or the sugar syrup wasn’t hot enough. To fix it, place the bowl over a pot of boiling water (double boiler method) and warm it gently while beating until it starts to melt. Next, whip it using medium-high speed with the whip or paddle attachment. Give it time to come back together. Most problems with Italian Meringue can be fixed by just allowing it time to whip at least 10-15 minutes.
Deflated Buttercream: If your buttercream deflates or turns into a liquid mess when you add the butter, it might be because the butter was too cold or the egg whites were too warm. Make sure both are at the same temperature. If it still doesn’t come together, keep beating on medium-high speed for another 10-15 minutes. It can take a bit of time, but it usually comes back together.
Too Sweet: If you find your buttercream too sweet, you can balance it out by adding a pinch of salt or a bit of lemon juice. This can help cut through the sweetness and add a bit of depth to the flavor.
Too Runny: If your buttercream is too runny, it might be because the sugar syrup wasn’t cooked to the right temperature (235-240°F). Make sure to use a candy thermometer to get it just right. If it’s already made and too runny, try chilling it in the fridge for a bit and then re-whip it.
Adding Flavorings: When adding extracts or other flavorings, do it gradually and taste as you go. Too much liquid can cause the buttercream to break, so it’s best to add a little at a time. See my recommendations below.

Flavor Variations

This basic recipe can easily be adapted to create other flavors. Here are some to try. My personal favorite trick is adding white chocolate for an extra silky smooth decorator’s icing that tastes as good as it looks!

1. White Chocolate Italian Meringue Buttercream:

Ingredients: Add 4 ounces of melted and cooled white chocolate to the buttercream.
Instructions: Gently fold the melted white chocolate into the prepared buttercream until fully incorporated. Make sure the white chocolate is not too warm, or it could melt the butter.

2. Lemon Italian Meringue Buttercream:

Ingredients: Add 2-3 tablespoons of fresh lemon juice and 1 tablespoon of lemon zest.
Instructions: Mix the lemon juice and zest into the buttercream until well combined. Adjust the amount of lemon juice to achieve your desired level of tartness.

3. Almond Italian Meringue Buttercream:

Ingredients: Add 1 teaspoon of almond extract.
Instructions: Mix the almond extract into the buttercream until well combined. You can also garnish with toasted almond slices for an extra touch.

4. Coffee Italian Meringue Buttercream:

Ingredients: Dissolve 1-2 teaspoons of instant coffee or espresso powder in 1 tablespoon of hot water.
Instructions: Let the coffee mixture cool slightly, then mix it into the buttercream until fully incorporated. Adjust the amount of coffee to taste.

5. Raspberry Italian Meringue Buttercream:

Ingredients: Add 1/4 cup of raspberry puree (strained to remove seeds).
Instructions: Fold the raspberry puree into the buttercream until well combined. You can also use other berry purees, such as strawberry or blueberry, for different variations.

6. Chocolate Italian Meringue Buttercream:

Ingredients: Add 1/4 cup of cocoa powder and 2 tablespoons of melted and cooled chocolate of your choice.
Instructions: Mix the cocoa powder into the buttercream until well combined, then fold in the melted chocolate for a rich and decadent flavor.

7. Mint Italian Meringue Buttercream:

Ingredients: Add 1 teaspoon of peppermint extract.
Instructions: Mix the peppermint extract into the buttercream until well combined. For a fun twist, add a few drops of green food coloring.

8. Salted Caramel Italian Meringue Buttercream:

Ingredients: Add 1/4 cup of salted caramel sauce.
Instructions: Fold the salted caramel sauce into the buttercream until well combined. You can also drizzle additional caramel on top for extra flavor.

9. Peanut Butter Italian Meringue Buttercream:

Ingredients: Add 1/4 cup of smooth peanut butter.
Instructions: Mix the peanut butter into the buttercream until fully combined. This creates a creamy and nutty flavor that pairs well with chocolate cakes.

10. Coconut Italian Meringue Buttercream:

Ingredients: Add 1/4 cup of coconut cream and 1 teaspoon of coconut extract.
Instructions: Mix the coconut cream and extract into the buttercream until well combined. Garnish with toasted coconut flakes for an extra touch.

11. Nutella Italian Meringue Buttercream:

Ingredients: Add 1/4 cup of Nutella.
Instructions: Mix the Nutella into the prepared buttercream until fully combined. This will give your buttercream a rich, chocolate-hazelnut flavor that’s absolutely delicious

I hope you enjoy making and using Italian Meringue Buttercream as much as I do. It’s a versatile and delicious option for decorating cakes and cupcakes, offering a silky texture and balanced sweetness. Don’t forget to rate this recipe, leave a review and share your baking creations with me on Instagram @thesprinkledcakery!

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