American Mock Meringue Buttercream

American mock meringue buttercream combines the sweetness and stability of American buttercream with a smoother, silkier texture inspired by meringue-based frostings. It does not require cooking a sugar syrup or heating egg whites, making it a practical option when you need a large batch of buttercream for filling, frosting, and decorating cakes.

The recipe uses pasteurized egg whites, meringue powder, heavy cream, powdered sugar, and butter to create a stable frosting with a lighter mouthfeel than traditional American buttercream.

What Is Mock Meringue Buttercream?

Traditional Swiss and Italian meringue buttercreams begin with egg whites and granulated sugar that are heated or combined with a cooked sugar syrup. Butter is then emulsified into the meringue.

Mock meringue buttercream takes a different approach. Pasteurized egg whites and meringue powder provide structure without requiring a cooked meringue. Powdered sugar gives the frosting sweetness and body, while butter and heavy cream create richness and a smooth finish.

The result is still sweeter than a traditional meringue buttercream, but smoother and less crusting than a standard American buttercream.

Why This Buttercream Works

Each ingredient serves a specific purpose:

• Heavy whipping cream adds richness and helps loosen the buttercream.
• Pasteurized egg whites give the frosting structure and a lighter texture. Use refrigerated pasteurized egg whites from a carton, not raw egg whites separated from shell eggs.
• Meringue powder helps stabilize the egg-white base.
• Powdered sugar provides sweetness and gives the buttercream enough body for frosting and piping.
• Unsalted butter creates the smooth texture and rich flavor.
• Salt balances the sweetness.
• Vanilla extract and butter flavoring round out the flavor so the frosting tastes less like plain powdered sugar.

Equipment Needed

You will need:

• A stand mixer
• A whisk attachment
• A paddle attachment
• A flexible rubber spatula
• Measuring cups and spoons
• A digital kitchen scale, if weighing the butter and powdered sugar

A hand mixer is not recommended for this full batch. The recipe produces approximately 8 cups of buttercream and requires enough bowl capacity to incorporate two pounds of butter without overcrowding the mixer.

Ingredients

• ⅓ cup heavy whipping cream
• ⅔ cup pasteurized egg whites
• ½ teaspoon fine salt
• 4 tablespoons meringue powder
• 2 pounds powdered sugar
• 2 pounds unsalted butter, softened to cool room temperature
• 2 teaspoons vanilla extract
• 1 teaspoon butter flavoring

The butter should be pliable enough to press with a finger but should not look shiny, greasy, or partially melted. Butter that is too warm can make the finished buttercream loose.

How to Make American Mock Meringue Buttercream

1. Combine the cream and egg whites.

Add the heavy whipping cream and pasteurized egg whites to the bowl of a stand mixer fitted with the whisk attachment. Mix for approximately 30 seconds, until combined.

2. Add the dry ingredients.

Add the meringue powder, salt, and powdered sugar.

Begin mixing on low speed so the powdered sugar does not escape from the bowl. Once the sugar is moistened, increase the mixer to medium-high speed and whip for 5 minutes.

The mixture should become lighter and more cohesive. Stop the mixer and scrape the bottom and sides of the bowl if any dry ingredients remain.

3. Add the butter gradually.

Cut the softened butter into small chunks. With the mixer running, add the butter gradually instead of placing all of it into the bowl at once.

Allow each addition to begin incorporating before adding more. Adding the butter slowly helps the liquid base and butter form a stable emulsion.

The mixture may briefly look uneven or curdled as the butter is added. Continue mixing. It should come back together as the ingredients reach the same temperature and emulsify.

4. Add the flavorings.

Once all the butter has been incorporated, add the vanilla extract and butter flavoring. Whip for another 2 minutes.

Taste the buttercream and confirm that the salt and flavorings balance the sweetness before decorating.

5. Finish with the paddle attachment.

Replace the whisk attachment with the paddle attachment. Beat the buttercream on high speed for 5 minutes, stopping to scrape the bowl as needed.

The finished buttercream should look smooth and silky and should hold its shape when lifted with the paddle.

How to Tell When the Buttercream Is Ready

Properly mixed mock meringue buttercream should:

• Hold a soft peak without appearing runny
• Spread smoothly without tearing the cake
• Remain firm enough for borders and simple piping
• Look cohesive rather than greasy or curdled
• Feel smooth rather than grainy from powdered sugar

Temperature matters as much as mixing time. If the buttercream is too cold, it may look curdled or feel stiff. If it is too warm, it may become loose and greasy.

Troubleshooting Mock Meringue Buttercream

Why does my buttercream look curdled?

Curdling usually means the ingredients are at different temperatures. Continue mixing first because many batches come back together without additional correction.

If the mixture remains cold and curdled, gently warm the outside of the mixing bowl for a few seconds and continue mixing. Do not melt the butter.

Why is my buttercream loose?

The butter or mixing bowl may be too warm. Refrigerate the bowl for 10 to 15 minutes, then continue mixing until the buttercream becomes smooth and holds its shape.

Do not add more powdered sugar immediately. That changes the balance of the recipe and can make the buttercream unnecessarily sweet.

Why is my buttercream too stiff?

The butter may be too cold. Allow the bowl to sit at room temperature briefly, then mix again.

If the temperature is correct and the buttercream is still too firm, add heavy cream 1 teaspoon at a time until it reaches the desired consistency.

Why does the buttercream have air bubbles?

Make sure the buttercream completes the final mixing period with the paddle attachment. Stop and scrape the bowl so that pockets of unmixed frosting do not remain around the sides or beneath the paddle.

When frosting the cake, work the buttercream back and forth against the side of the bowl with a spatula to press out any remaining visible air pockets.

Can I color this buttercream?

Yes. Gel food coloring works best because it adds concentrated color without introducing a large amount of extra liquid.

Add the coloring after the buttercream is fully mixed. Remember that many gel colors deepen slightly as they rest.

Can I use this buttercream for piping?

Yes. The buttercream can be used for filling and frosting cakes, piping borders, cupcakes, rosettes, and other basic decorations.

For very detailed piping, allow the buttercream to firm slightly before using it.

Storage

Because this buttercream contains heavy cream and pasteurized egg whites, keep it refrigerated when it is not being used.

Before decorating, allow refrigerated buttercream to return to a workable cool room temperature. Mix it again with the paddle attachment until the texture becomes smooth and spreadable.

Recipe Origin

Cake artist Shannon Mayes developed this hybrid-style buttercream to combine the smooth mouthfeel of a meringue buttercream with the sweetness and stability of American buttercream. I used this recipe at The Cookie Emporium because it worked well for filling, frosting, and decorating cakes while still delivering the sweeter flavor many customers preferred.