How to Make Butterfly Cakes? A Classic Step-By-Step Tutorial

In a muffin tin, a vanilla sponge bakes into twelve small rounds, each one later topped with buttercream wings in this classic British teatime treat. The whole project runs about an hour from creaming the butter to piping the final body, and a single 12-hole tin yields twelve bakery-style cakes with wings that actually stand up. They look far more fiddly than they are, which is precisely the trick.

Below you’ll find the equipment list, the sponge method, the sawing technique, piping tips, and a troubleshooting matrix for the five most common failures, written for home bakers who want reliable wings without last-minute stress.

What a Butterfly Cake Actually Is and Why the Shape Endures

A butterfly cake is a single-serving sponge, usually vanilla, baked in a paper case inside a standard muffin tin. Once cooled, the domed top is sliced off, the disc is halved again, and the two halves are pressed back into a piped swirl of buttercream at a gentle angle. The result resembles a butterfly perched on a flower, with wings outspread and a piped body running along the centre seam.

The form sits inside the British “fairy cake” tradition, and Mary Berry’s version is widely treated as the touchstone home-baking recipe, appearing in her Fast Cakes cookbook and on BBC Good Food. Fairy cakes and butterfly cakes share the same base sponge, but fairy cakes are left whole with a simple flat-top icing, while butterfly cakes are distinguished by the cut-and-reassemble wing technique.

Calling them “butterfly cupcakes” is common in US baking blogs, though UK purists reserve “cupcake” for richer, larger American-style bakes.

Three cues decide whether the finished cakes look tidy or tired. First, the dome needs a clean saw rather than a crushed press, so the cut surface stays flat enough to seat against the buttercream. Second, the filling has to be generous, squeezing slightly above the rim so it locks the wings in place.

Third, the wings should sit at roughly 30 degrees from vertical, steep enough to suggest flight but shallow enough that gravity does not pull them flat within the hour.

Why the format survives children’s parties and Mother’s Day

Butterfly cakes occupy a narrow sweet spot: light enough to serve at afternoon tea without overwhelming the sandwich course, yet sturdy enough to hold a piped body and a sugar dusting without collapsing. They scale easily to twenty-four or thirty-six for a school bake sale, and the decoration stage doubles as a child-friendly activity, since older kids can pipe the bodies and place chocolate chip eyes with minimal supervision.

Equipment and Ingredients Worth Choosing Before You Start

Gather everything before you cream the butter. A standard 12-hole muffin tin lined with paper cases is the baseline; deep cupcake tins force the batter up the sides and produce dry edges with uneven centres. A 12-cup tin gives you twelve finished butterfly cakes from a single batch, which matches most home sponge recipes one-for-one.

The classic sponge ingredients

• ▸Soft unsalted butter: 110 g (about 1 stick minus a tablespoon), at cool room temperature so it creams without melting.
• ▸Caster sugar: 110 g. Superfine sugar dissolves faster than granulated, which protects the sponge’s tender crumb.
• ▸Self-raising flour: 110 g, sifted. Plain flour plus 1 teaspoon baking powder is an acceptable substitute.
• ▸Large eggs: 2, beaten lightly before adding.
• ▸Vanilla extract: 1 teaspoon, or a scrape of vanilla bean paste for a stronger note.

The buttercream and finishing kit

• ▸Buttercream base: 150 g unsalted butter, 280 g icing sugar, 1 teaspoon vanilla, and 1 to 2 teaspoons milk to loosen.
• ▸Piping bag and nozzle: one large open star (such as a Wilton 1M) for the filling swirl, plus one small round (Wilton 3 or 4) for piping the body and antennae.
• ▸Serrated knife: a small 4-inch cake saw, or a serrated paring knife, to cut the domes cleanly.
• ▸Fine sieve: for dusting icing sugar over the finished wings just before serving.
• ▸Decorations: Smarties, chocolate chips, or sugar pearls for the head dots, plus a dusting of icing sugar.

Dietary swaps that hold the structure

Gluten-free self-raising flour with a quarter-teaspoon of xanthan gum per 110 g produces a sponge with the same rise and slice-clean crumb. Dairy-free block butter (the firm sticks, not soft tub spreads) works in both the sponge and the buttercream, though the buttercream may need an extra teaspoon of milk to whip to soft peaks.

For egg-free sponges, one flax egg (1 tablespoon ground flaxseed whisked with 3 tablespoons water, rested 10 minutes) replaces each egg, but expect a slightly denser crumb that benefits from an extra minute in the oven.

“If you bake in a deep cupcake tin, drop the oven temperature by 10°C and add three minutes to the bake time. The thicker walls hold heat longer and dry out the edges before the centre sets.

Baking the Sponge With Cues That Prevent Sinking and Dry Crumb

The creaming method is the safest route for first-time butterfly cake bakers because it forces air into the fat in a controlled way. Beat the soft butter alone for thirty seconds to loosen it, then add the caster sugar and beat on medium-high for a full three to four minutes, until the mixture looks pale, fluffy, and almost mousse-like. Rushing this stage is the single most common cause of dense, heavy sponges that sink as they cool.

Adding eggs and flour without overworking

Add the beaten eggs in three additions rather than all at once, beating well between each. If the mixture begins to look curdled or split, stop the mixer and add a tablespoon of the measured flour before continuing; the flour stabilises the emulsion and stops the batter from breaking.

Once the eggs are fully incorporated, switch to a large metal spoon and fold in the sifted self-raising flour (and baking powder, if using) in two additions, cutting through the centre and sweeping up the side each time. Stop the moment you cannot see streaks of flour. Overworking at this stage develops gluten and bakes out as a tough, tunneled crumb.

Oven temperature, fill level, and the spring-back test

Heat the oven to 180°C (350°F) with a rack in the centre. Spoon the batter into the lined muffin tin so each case is roughly two-thirds full, about 35 g per case for a standard muffin hole. Bake for 15 to 20 minutes, rotating the tin at the halfway mark if your oven runs hot on one side.

The sponge is ready when it has risen into a smooth dome and springs back to a light finger press, and a skewer inserted into the centre emerges with no wet batter clinging to it.

Cool the cakes in the tin for five minutes, then lift them out by the paper case edges and set them on a wire rack. Trapped steam is the silent killer of butterfly cakes; if you leave them in the tin to cool fully, condensation wets the inside of the case and the paper peels away from the sponge the moment you try to lift it.

A full cool of about 45 minutes on the rack is non-negotiable before cutting.

Sawing the Dome and Angling the Wings Without Crumbling

The cut is the moment where most home bakers lose confidence, but the technique is closer to woodworking than cake decorating. Hold a small serrated knife almost parallel to the cake, with the blade starting about one centimetre above the widest point of the dome. Rest the cake steady on the flat of your non-dominant hand, then saw gently back and forth while rotating the cake slowly with your dominant hand.

The blade should never press downward; gravity and the serrations do the work.

Depth, angle, and the 30-degree seat

Cut only the upper third of the cake, the domed cap above the paper case rim. Cutting deeper hollows the base and leaves no room for the piped filling, which then collapses and pushes the wings flat. Once the dome is removed, lay it flat-side up and slice it cleanly through the middle so you get two equal-thickness discs. Each disc becomes one wing.

Pipe a generous swirl of buttercream into the hollow left by the dome, then take the two discs and seat them cut-side down into the buttercream at roughly 30 degrees from vertical. They should lean slightly away from each other, like a tent, with the rounded crust sides facing up and outwards. This angle is steep enough to read as wings from across a tea table and shallow enough that the buttercream supports them without sliding.

“Chill the sponges for 20 minutes in the freezer (or 45 minutes in the fridge) before cutting if the crumb drags or tears when you saw. A cold sponge has a firmer internal structure and slices cleanly without pulling.

Piping the Filling, Shaping the Body and Finishing the Wings

The filling is doing more structural work than it gets credit for. Use a generous swirl, not a polite ring, and let the buttercream squeeze slightly above the rim of the hollow so it locks the wings in place. Underfilled cakes let the wings slide outward and slump within the hour; overfilled cakes push the wings too far apart and the body piping looks stretched.

The piping bag without a professional tip

If you don’t have a piping bag, spoon the buttercream into a sturdy zip-lock freezer bag, snip one corner to about 1.5 cm, and use that as a makeshift piping bag. For a more decorative filling, snip a small V into the cut edge so the icing emerges in a flattened star. For the body, snip a smaller hole (about 5 mm) so the line is slim and tidy.

A round piping nozzle is still the cleanest option, but a freezer bag works in a pinch and produces a perfectly acceptable finish.

The body, the head, and the final dusting

Pipe a slim, straight line of buttercream along the centre seam where the two wings meet, using a small round nozzle and steady pressure from one end of the cake to the other. Anchor a small dot of buttercream at each end of the line to form the head and tail, then press on a Smartie, chocolate chip, or sugar pearl at the head end for the eyes.

Two tiny antennae can be drawn with a toothpick through the head dot, or simply omitted for a cleaner finish.

Dust the wings with icing sugar through a fine sieve just before serving, holding the sieve 20 cm above the cakes so the sugar falls in a soft, even cloud. Dusting too early lets moisture from the sponge dissolve the sugar into blotches; dusting too late means the wings have already dulled. The dust settles into a crisp, bakery-style finish that photographs beautifully.

Scaling Up for Bake Sales, Fixing Common Failures and Storing Ahead

Scaling butterfly cakes for a school bake sale is straightforward, but resist the temptation to multiply a single recipe into one oversized bowl. Two or three separate batches, mixed and baked sequentially, produce more even results than one giant batch. An overfilled stand mixer under-aerates the butter, and the resulting batter bakes unevenly: pale and sunken in some cases, golden and over-risen in others.

The five failures and how to fix each

Make-ahead and storage strategy

Baked sponges keep for three days in a sealed container at room temperature, and they freeze well for up to one month. Freeze them in the paper cases inside a lidded box, then thaw overnight on the counter still in their cases. Cutting, filling, and piping are best done on the day of serving so the wings stay crisp and the icing sugar dusts cleanly.

Assembled butterfly cakes keep for 24 hours in a lidded box at room temperature, away from direct sunlight. Refrigeration dulls the buttercream and causes the wings to weep condensation, which dissolves the icing sugar dusting. For longer holds, store the unfilled sponges and the buttercream separately in the fridge, then assemble and dust within an hour of serving.

Final Thoughts

Butterfly cakes reward patience at three precise moments: the three-minute creaming stage, the sawing of the dome, and the seating of the wings at 30 degrees. Nail those cues and the rest is assembly. The result is twelve charming, bakery-style sponges that hold their shape from kitchen to tea table, and a recipe you can scale to thirty-six for a school bake without losing the clean rise or the tidy piped body.

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