Gluten-Free Opera Cake

A classic French opera cake: three thin layers of almond joconde sponge soaked with coffee syrup, layered with coffee buttercream and dark chocolate ganache, and finished with a glossy chocolate glaze. It is a project, best made a day before a holiday dinner.

Prep: 75 min Cook: 10 min Total: 330 min Serves: 12

At a glance: This hard desserts recipe yields 12 servings in about 5h 30m (75 min prep, 10 min cook). It uses 15 ingredients — including finely ground almond flour, powdered sugar, whole eggs — and walks through 9 steps. Updated October 24, 2026. Browse more desserts recipes or return to all gluten-free recipes.

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Cross-Contamination Warning for Gluten-Free Opera Cake: When preparing this desserts recipe, instant espresso powder and some chocolate are made on shared lines with products that contain gluten, so check those labels. Flour dust travels. Bake this on a day the kitchen is not also handling flour that contains gluten, use clean bowls, beaters and baking sheets, and keep the gluten-free flour blend in its own sealed container.

Gluten-Free Notes for Gluten-Free Opera Cake: The joconde sponge is mostly almond flour, with a small amount of gluten-free all-purpose flour blend in place of the usual flour. Use almond flour, powdered sugar, chocolate, instant espresso and a flour blend labeled gluten-free.

Scale Recipe:

servings

Ingredient amounts update automatically

Instructions

1 Preheat the oven to 425°F (220°C). Line a 12x17-inch half-sheet pan with parchment and grease the paper.
2 For the sponge, beat the almond flour, powdered sugar and whole eggs on high for 5 minutes, until pale and thick. Fold in the gluten-free flour blend.
3 In a clean bowl, whip the 4 egg whites to soft peaks, add 2 tbsp sugar and whip to firm, glossy peaks. Fold the whites into the almond mixture in two additions, then fold in the melted butter. Spread evenly in the pan.
4 Bake for 7-9 minutes, until light golden and springy. Cool for 5 minutes, run a knife around the edges, and turn the sponge out onto parchment. Cool completely, then cut it crosswise into three 12x5 1/2-inch strips.
5 For the syrup, stir the hot coffee with 1/4 cup sugar until dissolved. Cool.
6 For the ganache, heat the cream until steaming, pour it over the chocolate, wait 2 minutes and stir until smooth. Set aside 1/2 cup for the glaze and let the rest cool until thick enough to spread, about 30 minutes.
7 For the buttercream, whisk the 2 egg whites and 1/2 cup sugar in a heatproof bowl over simmering water until the sugar dissolves and the mixture reaches 160°F (71°C). Whip on high until stiff and cool, about 8 minutes. Beat in the butter a tablespoon at a time, then the dissolved espresso, until smooth.
8 Place one sponge strip on a board and brush it generously with syrup. Spread with half the buttercream. Top with the second strip, brush with syrup, and spread with the thickened ganache. Add the last strip, brush with syrup, and spread with the remaining buttercream in a thin, smooth layer. Chill for 1 hour.
9 Warm the reserved ganache until just pourable, about 90°F (32°C), and pour it over the top, spreading it to the edges. Chill for at least 2 hours, then trim the edges with a hot, dry knife and cut into 12 slices.

Tips & Notes

Bake the joconde sponge only until it springs back. It is very thin, and an extra minute makes it too dry to soak up the coffee syrup.
Spread each layer of the opera cake thin and even, and chill between steps if the buttercream starts to soften. Neat, flat layers are what give the classic striped slice.
Use a long knife dipped in hot water and wiped dry for every cut. It slices cleanly through the chocolate glaze without cracking it.

Common questions

How long does Gluten-Free Opera Cake take?

Gluten-Free Opera Cake takes about 5 hours 30 minutes, including resting time: 75 minutes to prep and 10 minutes to cook, for 12 servings.

What should I check before making Gluten-Free Opera Cake with celiac disease?

Written with gluten-free ingredients. Use products labeled gluten-free, check labels, and ask your clinician about your own needs.

What cross-contamination risk is specific to Gluten-Free Opera Cake?

Check finely ground almond flour, powdered sugar, for the sponge, whole eggs, at room temperature before they go into Gluten-Free Opera Cake. Instant espresso powder and some chocolate are made on shared lines with products that contain gluten, so check those labels. Flour dust travels. Bake this on a day the kitchen is not also handling flour that contains gluten, use clean bowls, beaters and baking sheets, and keep the gluten-free flour blend in its own sealed container.

Which gluten-free swaps does Gluten-Free Opera Cake use?

Gluten-Free Opera Cake relies on a gluten-free all-purpose flour blend, blanched almond flour. Keep those gluten-free-labeled products in place of a gluten-containing flour or sauce. If the blend already lists xanthan gum, do not add a second binder unless this recipe says to.

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