How to make Italian Meringue Buttercream
While planning my wedding a few years ago I had this crazy idea to make my own wedding cake. I did a lot of research and tried a lot of recipes. In the end I decided to let someone else worry about the cake, which turned out to be an incredibly smart decision, but along the way I made the most amazing discovery— meringue buttercream.
Meringue buttercream is exactly what is sounds like, light meringue meets sweet buttercream. It’s buttery, but also light. It’s sweet, but not tooth-achingly sweet. To put it simply, it’s amazing. It falls into two categories, Swiss Meringue Buttercream and Italian Meringue Buttercream, the difference being how the sugar and eggs are cooked. I’ve made both and the end result is the same.
I admit that meringue buttercream is a little more complicated to make than other icings, and that can be intimidating. But my hope is to break it down and show you how very doable it is. Anyone can make it! And you definitely should make this, trust me.
The full recipe is below, but the required ingredients for Italian Meringue Buttercream are: egg whites, butter, sugar, water, and vanilla extract. You’ll also need a small saucepan, whisk, candy thermometer, and a stand mixer. And since this is a recipe where things happen quickly once you get going, it’s best to have everything out and ready to go before you begin.
Ready? Let’s begin! First, combine the sugar and water in a small saucepan.
Then set the saucepan over medium heat, stirring occasionally with the whisk.
Bring the sugar to a boil. Once it starts boiling, stop stirring and insert a candy thermometer.
Now is a good time to make sure you have everything else ready to go. Put the egg whites in the stand mixer.
And have your butter cubed and ready nearby.
Once the sugar reaches about 225 degrees F, start whipping the egg whites on medium high speed. The goal is to get the egg whites whipped to soft peaks by the time the sugar reaches 238 degrees, or “soft ball” stage.
Once the sugar reaches the soft ball stage, remove it from the heat.
With the mixer on low speed, pour the sugar into the whipped egg whites in a small, steady stream. Be careful to pour it directly into the egg whites without hitting the side of the bowl or the beater.
Once the sugar is all added, increase the speed to high and beat until the mixture cools to room temperature. During this time the hot sugar will cook the egg whites.
I test the temperature by placing my hand on the bowl and know it’s ready when it is no longer too hot to touch.
Now it’s time to add the butter.
Reduce the mixer speed to medium and add the butter a few tablespoons at a time.
When all of the butter has been added, pour in the vanilla extract.
Then increase the speed to high and beat the buttercream for a few minutes until it is completely smooth.
This is what you want, a smooth and light mixture. Go ahead and taste it, and prepare to be blown away.
Like I said, it can be tricky. But it’s worth it!
Use the buttercream right away, or store it for later. In a covered container it will last up to one week in the fridge and several months in the freezer.
When you’re ready to use it, bring it completely back to room temperature. Then return it to the stand mixer and beat on high for several minutes. It’s likely that it will separate as you whip it, but should come back together again after five minutes or so.
So, what can you do with your Italian Meringue Buttercream?
You can frost some raspberry cupcakes, flavor it with coconut for this Southern Coconut Cake, or use brown sugar to make a brown sugar meringue buttercream for this Triple Browned Cake. You simply can’t go wrong with Italian Meringue Buttercream. Next time you’re icing a cake, give this recipe a try. I hope you’ll love it as much as I do, I’m sure you will!
Italian Meringue Buttercream
- 1 cup granulated sugar (200 grams)
- ¼ cup water (60 ml)
- 4 large egg whites
- 2 cups unsalted butter , at room temperature (1 pound, 450 grams)
- 1 teaspoon vanilla extract
- Combine the water and sugar in a saucepan over medium heat. Bring the mixture to a boil, stirring occasionally. Once it boils, stop stirring and insert a candy thermometer.
- Meanwhile, whip the egg whites in the bowl of a stand mixture to soft peaks. When the sugar is at 238°F, add it to the egg whites in a slow steady stream with the mixer on medium speed.
- Increase the speed to high and beat until cooled to room temperature.
- Add the butter a few tablespoons at a time, while continuing to mix on medium high speed. Add the vanilla. Increase the speed to high and beat until smooth.