What is Wedding Cake Icing Called? Buttercream vs. Fondant Explained

You’re standing in front of a bakery display case or scrolling through Instagram, trying to figure out what the smooth, glossy white coating on that stunning tiered cake actually is. It looks like paint, it feels like clay, and it tastes... well, that depends entirely on who made it. The question "what is wedding cake icing called" seems simple, but the answer is tricky because there isn't just one thing. In the professional baking world, we don’t usually use the word "icing" as a catch-all term. Instead, we talk about specific types of coatings, each with its own name, texture, and purpose.

If you are planning your wedding, understanding these differences saves you from ordering something you hate. You might love the look of a crisp, perfect square but realize halfway through the reception that you can’t stand the taste of sugar paste. Or maybe you want a rustic, homemade feel but worry it won’t hold up in the Sydney heat. Let’s break down exactly what those coatings are, so you can tell your baker exactly what you want without speaking their secret language.

The Big Three: Buttercream, Fondant, and Royal Icing

Most people think there are two options: creamy stuff or hard stuff. That’s an oversimplification. There are three primary categories used for wedding cakes, and they serve different jobs. Knowing the names helps you communicate with your cake maker.

Then there is Fondant, which is a pliable sugar paste made from sugar, water, gelatin, glycerin, and glucose syrup. When people ask "what is wedding cake icing called," they are almost always referring to fondant if the cake looks perfectly smooth and matte. It rolls out like dough and drapes over the cake like fabric. It’s great for structure but controversial for taste.

Finally, we have Royal Icing, defined as a hard-drying icing made from whipped egg whites (or meringue powder) and powdered sugar. This isn’t typically used to cover the whole cake. It’s the glue that holds decorations together and creates sharp, piped details that dry rock-hard.

Why Do Bakers Use Different Names?

It’s not just pedantry. The terminology tells you how the cake will behave. If you ask for "icing," a baker might give you a thin glaze that drips off. If you ask for "frosting," they might give you a thick, messy layer. But if you ask for "Swiss Meringue Buttercream," they know you want stability and elegance. If you ask for "Fondant," they know you want a sculptural, clean finish.

Here is a quick breakdown of the main types you’ll encounter:

Fondant: The Smooth Operator

Let’s address the elephant in the room. Many guests peel off the outer layer of a wedding cake before eating it. Why? Because traditional fondant has a reputation for tasting like cardboard wrapped in sugar. But here’s the thing: high-quality fondant shouldn’t taste bad. It should be mild. The issue usually arises when cheap, mass-produced fondant is used, or when the baker applies it too thickly.

So, why do bakers still use it? Structure. If you want a three-tier cake that stands perfectly straight under the weight of itself and decorations, fondant provides a rigid shell. It protects the cake underneath from drying out and allows for intricate piping, ruffles, or smooth, minimalist aesthetics that buttercream simply can’t achieve without looking wobbly.

If you choose fondant, ask your baker about the brand. Some premium brands incorporate real vanilla bean or almond extract into the paste itself, making it edible and enjoyable. Also, consider a "fondant-covered buttercream" approach. This means the cake is coated in buttercream first, then covered in fondant. This adds moisture and flavor between the sponge and the sugar shell, solving the dryness complaint.

Buttercream: The Crowd Pleaser

If you want your guests to actually eat the cake, go with buttercream. Specifically, ask for Swiss Meringue Buttercream or Italian Meringue Buttercream. These are made by cooking sugar syrup into egg whites before whipping in butter. The result is a frosting that is incredibly smooth, stable at room temperature, and significantly less sweet than American buttercream.

Buttercream allows for more artistic freedom in terms of texture. You can get a "semi-naked" look where the cake layers show through, or a heavily textured, rustic finish with spatula strokes. It feels more organic and handmade. However, it requires care. Buttercream melts. If your wedding is outdoors in February in Australia, you need shade or refrigeration until the last possible moment. If you’re in a hot venue, Italian meringue is generally more heat-stable than Swiss.

One common misconception is that buttercream cakes look "messy." Not true. A skilled decorator can create razor-sharp edges and perfectly smooth sides with buttercream. It just takes more skill and time than rolling out fondant. Expect to pay a bit more for labor if you want a flawless buttercream finish compared to a standard fondant job.

Royal Icing and Other Specialized Coatings

You rarely see a whole cake covered in royal icing today unless it’s a traditional fruitcake style, which is common in the UK and some Australian traditions. Royal icing dries completely hard. It’s excellent for piping detailed borders, monograms, or delicate floral patterns that need to hold their shape.

Another rising star is Ganache. This is essentially melted chocolate mixed with cream. When cooled, it becomes a firm, glossy coating. It’s fantastic for "drip cakes" where the ganache runs down the sides. It’s also sturdy enough to support heavy decorations. If you love chocolate, this is a delicious alternative to sugar-heavy icings. Just note that ganache can seize or crack if handled too roughly during transport, so find a baker experienced with it.

There’s also Marzipan. In traditional British-style wedding cakes, the fruitcake is often covered in a layer of marzipan (almond paste) before being covered in royal icing. Marzipan adds moisture and a distinct almond flavor. It’s not common for light sponge cakes, but if you’re going for a classic, old-world vibe, this is the layer you’re looking for.

How to Choose the Right Coating for Your Wedding

Don’t just pick based on photos. Consider these factors:

• Venue Temperature: Is your ceremony indoors with AC? Or outdoors in summer? Buttercream struggles in direct sun. Fondant holds up better but can sweat in humidity.
• Guest Demographics: Are your guests adventurous eaters or traditionalists? Older relatives might prefer the familiarity of fondant on fruitcake; younger crowds often prefer buttercream on sponge.
• Budget: Fondant is cheaper in material cost but higher in labor. Buttercream is more expensive in ingredients (butter!) but faster to apply if you like a textured look. Intricate fondant designs cost the most.
• Design Style: Want geometric, sharp, modern lines? Fondant is your friend. Want boho, rustic, flowery vibes? Buttercream shines.

Here’s a pro tip: Ask for a tasting session that includes the coating. Don’t just taste the cake layers. Taste the buttercream alone. Taste the fondant alone. See if you can tolerate them. Many couples decide against fondant after tasting it raw. If you hate it, negotiate with your baker. Can they make the fondant thinner? Can they offer a hybrid model where only the top tier is fondant and the rest is buttercream?

Common Myths About Wedding Cake Icing

Myth 1: Fondant is inedible. False. It’s edible, just dense. Think of it like a thick candy bar wrapper. If you enjoy sweets, you’ll be fine. If you don’t, skip it.

Myth 2: Buttercream cakes collapse easily. Not if they’re built correctly. Professional bakers use dowels and board separators inside the tiers. The exterior coating doesn’t determine structural integrity; the internal engineering does.

Myth 3: All white cakes are covered in fondant. No. White buttercream exists. It’s just harder to keep pristine white because butter has a yellow tint. Bakers use titanium dioxide or shortening blends to whiten it, but it may look slightly creamier than fondant.

Final Thoughts on Terminology

Next time you’re chatting with a baker, drop the word "icing" and use the specific names. Say, "I’m interested in a Swiss Meringue Buttercream finish," or "Can we discuss a thin coat of fondant?" You’ll instantly sound like you know what you’re talking about, and they’ll respect your input more. Remember, the best coating is the one that matches your design vision and your palate. Whether it’s the smooth perfection of fondant or the rich comfort of buttercream, make sure you taste it first. Your wedding day is long, and you deserve a cake that tastes as good as it looks.