Porto's Opera Cake Slice
Prices and details last checked: Oct 29, 2026
Porto's Opera Cake is back on the menu, sold by the slice.
Here's what's in it, what it costs, and who might want to skip it.
What is the Porto's Opera Cake?
Opera cake is a French classic built from thin layers of coffee-soaked sponge, buttercream and chocolate.
Porto's version uses an almond sponge soaked in coffee, layered with mocha buttercream and dark chocolate ganache with a touch of brandy.
It's finished with a thin chocolate glaze, dark chocolate decor and a chocolate-covered coffee bean on top.
Opera Cake prices and sizes
| Size | Price | Note |
|---|---|---|
| Single | $4.55 | Bakery or online pickup |
Prices from Porto's official menu. They can change and may differ slightly between bakeries.
Opera Cake calories and nutrition
Porto's doesn't publish calories or nutrition facts for its menu, including the Opera Cake.
We haven't found a reliable third-party figure either, so we're not listing one. If you're tracking calories, ask the bakery or log a similar item and treat it as a rough estimate.
Ingredients and allergens
Porto's describes the Opera Cake as made with:
- Coffee-soaked almond sponge cake
- Mocha buttercream
- Dark chocolate ganache with a touch of brandy
- Chocolate glaze
- Dark chocolate decor
- Chocolate-covered coffee bean
Porto's doesn't publish an allergen chart. From its own description, the Opera Cake contains:
- Tree nuts, from the almond sponge.
- Milk, from the buttercream and ganache.
- Wheat, from the sponge cake.
- Egg, sponge cake is made with eggs.
We can't confirm anything beyond that. Porto's kitchens handle nuts, dairy, wheat and meat, so tell the counter about any allergy before you order.
How to order the Opera Cake
- Online pickup. Order on Porto's site for same-day pickup at any of the six bakeries. Ordering for the next day opens at 10 PM, and pickup runs 7:00 AM to 7:30 PM at the Preorder Counter. Bring the card you paid with and a photo ID.
- Walk in. Every bakery sells it from the counter. Weekend mornings have the longest lines.
Need a bakery? See all six Porto's locations with hours and parking.
Coffee, brandy and almonds
Three things in this slice catch people out.
The sponge is soaked in coffee and there's a coffee bean on top, so it has some caffeine. The ganache has a touch of brandy. And the sponge is made with almonds.
If you're serving kids, avoiding alcohol or dealing with a nut allergy, the Napoleon Slice is a safer pick from the same case.
How the Opera Cake compares
Here's how it compares with the rest of the cold sweets menu.
| Item | Price |
|---|---|
| Strawberry Guava Rose Macaron | $4.75 |
| Yuzu Meringue Tartlet | $4.69 |
| Ube Coconut Eclair | $4.09 |
| Opera Cake | $4.55 |
| Chocolate Eclair | $4.09 |
| Pumpkin Cheesecake Slice | $4.19 |
| Mini Pumpkin Pie | $4.19 |
| Flan Individual | $3.99 |
| Fresh Fruit Tartlet | $4.69 |
| Mango Mousse Bomb | $4.09 |
| Tiramisu Cup | $4.35 |
| Parisian Chocolate Cake Slice | $3.99 |
| Carrot Cake Slice | $3.99 |
| Napoleon Slice | $4.55 |
What to order with it
More from Cold Sweets
See all cold sweets with prices →
Porto's Opera Cake FAQ
How much is the Opera Cake at Porto's?
A slice costs $4.55 on Porto's official menu.
What is Porto's Opera Cake made of?
Coffee-soaked almond sponge cake layered with mocha buttercream and dark chocolate ganache with a touch of brandy, finished with chocolate glaze and a chocolate-covered coffee bean.
Does Porto's Opera Cake have alcohol?
Porto's lists a touch of brandy in the dark chocolate ganache.
Can I buy a whole Opera Cake at Porto's?
Porto's current menu lists it by the slice only. Ask your bakery if you need more for a group.
More Porto's guides
- Porto's Thanksgiving pre-order guideHoliday hours and same-day ordering
- All six Porto's locationsAddresses, hours and parking
- Full Porto's menu with pricesEvery pastry, cake and drink
Sources checked
- Porto's official menu page (descriptions and prices, checked Oct 29, 2026)
- Porto's official online ordering (prices, checked Oct 6, 2026)
Porto's doesn't publish nutrition or allergen information. Prices can change and may differ by bakery.