Walk into any professional bakery in the UK and ask the pastry chef what buttercream they use. Chances are, the answer is Swiss meringue buttercream — not the classic American version most home bakers grew up with. But why? And does it change what you should be making at home?
In this guide, we compare Swiss Meringue Buttercream (SMBC) and American Buttercream head-to-head — covering taste, texture, stability, ease of use, and which one gives you that flawless, bakery-level finish on cakes and cupcakes.
What Is American Buttercream?
American buttercream — sometimes called "simple buttercream" in the UK — is the most widely made frosting in home baking. The recipe couldn't be simpler: beat softened butter with icing sugar, add a splash of milk and vanilla, and you're done in under ten minutes.
It's everywhere for a reason. It's fast, accessible, and easy to colour. But spend any time decorating with it and the weaknesses start to show. Most home bakers will recognise the gritty texture, the overwhelming sweetness, and the way it starts to droop an hour into a summer party.
American Buttercream — Pros
- Ready in under 10 minutes
- Simple ingredients: butter and icing sugar
- Takes food colouring easily
- Good for a quick crumb coat or filling
- Familiar flavour most people recognise
American Buttercream — Cons
- Can turn gritty if not mixed properly
- Overly sweet — icing sugar taste dominates
- Wilts and droops at room temperature
- Difficult to achieve truly smooth, sharp edges
- Inconsistent results batch to batch
What Is Swiss Meringue Buttercream?
Swiss meringue buttercream (SMBC) is what you'll find in high-end bakeries and patisseries. It's made by gently heating egg whites and sugar together over a double boiler until the sugar dissolves and the mixture is pasteurised, then whipping it into a stiff, glossy meringue before butter is beaten in.
The result is a buttercream that is less sweet, significantly smoother, and more stable than American buttercream. It pipes beautifully, holds its shape for hours at room temperature, and melts in the mouth rather than coating it in sugar.
The key difference from Italian meringue buttercream is the method: Swiss uses a gentle double-boiler to dissolve the sugar before whipping, while Italian uses a poured hot sugar syrup. Swiss is considered the more approachable of the two professional methods — and the one most UK bakeries choose.
Swiss Meringue Buttercream — Pros
- Silky, ultra-smooth texture with no grittiness
- Less sweet — real butter flavour shines through
- Stable at room temperature for hours
- Perfect for piping, rosettes, and sharp edges
- Egg whites are pasteurised in the process — food safe
- Freezes and re-whips back to full silkiness
Swiss Meringue Buttercream — Cons
- More time-consuming than American buttercream
- Requires a stand mixer or powerful hand mixer
- Can split or curdle if butter is the wrong temperature
- Steeper learning curve for first-timers
Swiss Meringue vs American Buttercream: Side by Side
Taste: American buttercream is very sweet with an icing-sugar flavour that dominates. Swiss meringue is lightly sweet with a balanced, buttery richness. Winner: SMBC.
Texture: American can be dense or gritty. Swiss meringue is silky, airy, and melts on the palate. Winner: SMBC.
Stability at room temperature: American buttercream droops within one to two hours, especially in warm kitchens. Swiss meringue holds firm all day. Winner: SMBC.
Piping quality: American buttercream is adequate for basic shapes but struggles with tall, clean designs. Swiss meringue holds crisp rosettes, sharp edges, and fine detail. Winner: SMBC.
Ease of making: American buttercream wins here — it's under 10 minutes with minimal equipment. Swiss meringue takes 30 to 45 minutes and requires the right technique. Winner: American.
Colouring: Both take gel food colouring well. American has a whiter base; Swiss has a slightly off-white (ivory) base from the butter.
Best for: American is good for quick home bakes and cake filling. Swiss meringue is the choice for celebration cakes, wedding tiers, cupcake displays, and any occasion where appearance matters.
Which Buttercream Should You Choose?
Choose American buttercream if…
You need something fast and simple — filling a sponge for the weekend, making cupcakes for the kids, or any informal bake where appearance isn't the priority. There's nothing wrong with American buttercream for everyday home baking.
Choose Swiss meringue buttercream if…
You're decorating a birthday cake, a wedding tier, or anything that needs to look professional. If you want tall piped swirls that hold their shape, sharp edges on a layered cake, or a flavour that actually tastes like butter rather than icing sugar, Swiss meringue is the clear answer.
The honest truth? Most home bakers default to American buttercream not because it's better — but because Swiss meringue buttercream is notoriously tricky to make from scratch. The risk of splitting, the double boiler, the long mixing time… it puts people off. But that's exactly where Frostella changes everything.
The Shortcut Professionals Are Turning To
Frostella is the UK's first ready-made, additive-free Swiss meringue buttercream. Every tub is handcrafted fresh using real butter, egg whites, sugar, and vanilla. Nothing else. No preservatives, no gums, no artificial flavours — just the real thing, made for you.
Open the tub, give it a quick stir or brief whip, and you have bakery-quality Swiss meringue buttercream ready to pipe — without the thermometer, without the risk of splitting, and without the 40-minute process. The same professional buttercream used by top UK bakeries, available at home.
Frostella is available in a 500g Family Pack, a 1000g Party Pack for weekend bakes and small celebration cakes, and a 1500g Big Bake Tub for tiered cakes and large orders. Wholesale and professional sizes are also available.
How to Use Swiss Meringue Buttercream
Whether you're making it from scratch or using Frostella, the principles are the same:
1. Bring to room temperature. Remove from the fridge 20 to 30 minutes before use. Swiss meringue buttercream firms up when cold, so it needs time to soften before piping.
2. Re-whip briefly. A quick stir or 1 minutes with a hand mixer restores the silky, fluffy texture after refrigeration.
3. Colour (optional). Add gel food colouring a drop at a time and mix until smooth and even. Gel colours work better than liquid — they don't affect the texture.
4. Pipe or spread. Use a palette knife for smooth, sharp-edged finishes on cakes, or fill a piping bag with your favourite tip for swirls and rosettes on cupcakes. Swiss meringue holds its shape cleanly.
5. Store leftovers. Seal and refrigerate for up to one week, or freeze for up to three months. Re-whip to restore texture before using again.
Frequently Asked Questions
What is the difference between Swiss meringue buttercream and American buttercream?
American buttercream is made by beating butter with icing sugar — quick and simple, but very sweet and can turn gritty. Swiss meringue buttercream heats egg whites and sugar over a double boiler before whipping them into a meringue, then beats in butter. The result is silkier, less sweet, and far more stable at room temperature.
Which buttercream is best for piping?
Swiss meringue buttercream is the best choice for piping. It holds tall rosettes, sharp edges, and detailed shapes at room temperature for hours — something American buttercream struggles with, particularly in warmer conditions.
Can I buy ready-made Swiss meringue buttercream in the UK?
Yes. Frostella is the UK's first additive-free, ready-made Swiss meringue buttercream, freshly handcrafted and delivered next day across the UK. Made with real butter, egg whites, sugar and vanilla — no preservatives or artificial additives.
How long does Swiss meringue buttercream last?
Stored in an airtight container in the fridge, Swiss meringue buttercream lasts up to one week. It can be frozen for up to three months and re-whipped back to its original texture when needed.
Why does my American buttercream taste so sweet?
The high ratio of icing sugar in American buttercream creates its characteristic sweetness — often to the point where the butter flavour disappears. Swiss meringue buttercream uses a much smaller amount of sugar dissolved with egg whites, letting the real butter flavour come through for a more balanced, professional result.
Is Swiss meringue buttercream safe to eat?
Yes. The egg whites in Swiss meringue buttercream are pasteurised during the heating process — they reach a safe temperature before the meringue is whipped. Frostella's buttercream is made fresh and is completely safe to eat straight from the tub.
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