Italian Meringue Buttercream (Printable)

Silky, stable buttercream made by whipping Italian meringue into butter. Perfect for cakes and cupcakes.

# What You'll Need:

→ Italian Meringue

01 - 1 cup granulated sugar
02 - 1/4 cup water
03 - 3 large egg whites (about 100 g), room temperature
04 - 1/4 teaspoon cream of tartar (optional, for stability)

→ Buttercream

05 - 1 1/2 cups (340 g) unsalted butter, room temperature, cubed
06 - 1 teaspoon vanilla extract
07 - Pinch of fine salt

# Directions:

01 - Combine granulated sugar and water in a medium saucepan. Heat over medium, stirring gently until the sugar has fully dissolved.
02 - Increase heat to medium-high and cook without stirring until the syrup reaches 244°F (118°C) on a candy thermometer.
03 - While the syrup cooks, place egg whites (and cream of tartar, if using) in a stand mixer fitted with a whisk attachment. Beat on medium speed until soft peaks form.
04 - Once the syrup reaches 244°F, reduce the mixer to medium speed and slowly drizzle the hot syrup down the side of the bowl into the whipping egg whites in a thin, steady stream.
05 - Increase the mixer to high speed and whip until the meringue is glossy, thick, and the mixing bowl feels cool to the touch, approximately 10 minutes.
06 - With the mixer running on medium speed, add the cubed butter one piece at a time, allowing each addition to fully incorporate before adding the next. If the mixture appears curdled, continue beating—it will emulsify and become smooth.
07 - Add vanilla extract and a pinch of fine salt. Beat on medium-high speed until the buttercream is smooth, creamy, and fluffy.
08 - Use immediately for frosting. Alternatively, refrigerate in an airtight container. Before reuse, bring to room temperature and rewhip until restored to a fluffy consistency.

# Expert Tips:

01 -
  • Once you nail the technique, this buttercream tastes like something from a professional bakery and will make every cake you frost feel like an event.
  • The silky texture spreads like a dream and holds up beautifully at room temperature, which means no more frosting meltdowns at parties.
02 -
  • If your buttercream turns soupy, do not panic, just chill the bowl for ten to fifteen minutes and whip it again with confidence.
  • The moment the butter hits warm meringue is when everything looks like a mistake, but keeping the mixer running is the only move that saves it.
03 -
  • Use a candy thermometer every single time, because eyeballing sugar syrup is a gamble you will eventually lose.
  • Cube your butter while it is still slightly cool, then let it come to room temperature, so each piece incorporates smoothly and evenly.

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