🧁 Silky Swiss Meringue Buttercream (SMBC)

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⭐ Why You’ll Love This Buttercream

  • Ultra smooth & silky
  • Less sweet than American buttercream
  • Holds shape beautifully for piping
  • Perfect for weddings, birthdays, and layered cakes

📝 Ingredients

Makes enough to frost a 2-layer 8-inch cake or 24 cupcakes

  • 5 large egg whites (about 150 g)
  • 1¼ cups granulated sugar (250 g)
  • 1½ cups unsalted butter, room temperature & cubed (340 g)
  • 1½ teaspoons pure vanilla extract
  • ¼ teaspoon salt (optional, enhances flavor)

🔥 Step-by-Step Instructions

1️⃣ Heat Egg Whites & Sugar

  1. Add egg whites and sugar to a heatproof bowl.
  2. Place over a saucepan of gently simmering water (double boiler).
  3. Whisk constantly until the mixture reaches 160°F / 71°C and sugar is fully dissolved.

👉 Tip: Rub a drop between fingers—if it feels smooth, it’s ready.

2️⃣ Whip the Meringue

  1. Transfer mixture to a stand mixer with a whisk attachment.
  2. Whip on high speed for 8–10 minutes until:
    • Bowl feels cool
    • Meringue is stiff, glossy peaks

3️⃣ Add Butter

  1. Switch to the paddle attachment.
  2. Add butter one cube at a time on medium speed.
  3. Don’t panic if it looks curdled or soupy—keep mixing!

✨ It will magically turn smooth.

4️⃣ Flavor & Finish

  1. Add vanilla extract and salt.
  2. Mix on low speed for 2–3 minutes to remove air bubbles.
  3. Buttercream should be silky, smooth, and spreadable.

🎨 Variations & Flavor Ideas

🍫 Chocolate SMBC

  • Add 170 g (6 oz) melted, cooled dark chocolate

🍓 Strawberry SMBC

  • Add ¼ cup thick strawberry puree or jam

☕ Coffee SMBC

  • Add 1–2 teaspoons espresso powder dissolved in 1 tbsp hot water

🍋 Lemon SMBC

  • Add 1–2 tbsp lemon curd or zest + juice

❄️ Storage Tips

  • Room temperature: up to 1 day
  • Refrigerator: up to 7 days
  • Freezer: up to 3 months

👉 Re-whip before use to restore silkiness.

🚨 Troubleshooting

Too runny?
✔ Butter or bowl too warm → chill 10 minutes, then re-whip.

Looks curdled?
✔ Keep mixing — it WILL come together.

Too stiff?
✔ Add 1–2 tablespoons warm cream or milk.

🏆 Pro Baker Tips

  • Use room temperature butter (soft but not greasy)
  • Always whip until the bowl is cool
  • Paddle attachment = ultra smooth finish

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