Doughs & batters
génoise
génoise · A classical French sponge cake distinguished by its chemical-leavener-free aeration, achieved solely through the mechanical incorporation of air into a warm sabayon of eggs and sugar before folding in flour. The result is a tender, fine-crumbed cake with a tight, even texture that serves as a foundational component in European pastry.
The formula
1 : 1 : 1 (eggs : sugar : flour by weight)
The ratio is based on equal weights. For example: 100 g eggs (≈2 large), 100 g sugar, 100 g cake flour yields one 20 cm round or a 28×18 cm sheet, ~3 cm tall. For a richer génoise légère, melted butter (cool but liquid, ~40°C) is added at 20–25% of the total batter weight, folded in last.
Identity
- No baking powder, baking soda, or chemical leaveners — all lift comes from egg foam
- Eggs and sugar whisked over heat to a pale, thick sabayon that holds a ribbon
- Flour folded in two additions to preserve aeration and prevent overmixing
- Uniform, tight crumb with no tunneling or large air pockets
- Flat, even rise without doming if baked correctly
Ingredients
| Base | Whole eggs (large, 50–55 g each) | The sole leavening agent; ratio is always by weight, not count. Older eggs whip better due to runnier whites, but any fresh egg works. |
| Base | Fine granulated sugar | Dissolves during whisking and stabilizes the foam; contributes to structure and browning. |
| Binder | Cake flour (low-protein, ~7–8% gluten) | AP flour with 10–15% cornstarch added is a valid substitute. All-purpose alone produces a tougher crumb. |
| Fat | Unsalted butter (for génoise légère only) | Clarified or regular melted butter, cooled to ~40°C. Added after flour; enriches texture and flavor. |
| Seasoning | Fine sea salt | A pinch, ~1 g per 300 g total batter. Essential for flavor balance. |
Method
- 1Weigh eggs and sugar precisely (1:1 ratio by weight). Whisk together in a bowl set over barely simmering water (bain-marie).Gentle heat dissolves sugar faster and denatures egg proteins gradually, allowing greater air incorporation without cooking the eggs.
- 2Whisk continuously while heating until mixture reaches 45–50°C (113–122°F) or ribbon stage if working at room temperature. The sabayon should be pale, thick, and fall in a wide ribbon that holds its shape briefly.This temperature ensures sugar dissolution and optimal protein coagulation. The ribbon indicates sufficient air incorporation and protein coagulation to support the batter's structure.
- 3Remove from heat. Continue whisking until bowl cools to touch and mixture is very thick and pale — a ribbon should hold for 5+ seconds.Cooling sets the foam's structure. The extended whisking builds additional volume and stabilizes the protein network.
- 4Sift flour (and salt) together. Fold flour into egg foam in two additions using a large rubber spatula, sweeping from bottom to center.Dividing flour prevents overworking. Over-folding deflates the foam; under-incorporation leaves streaks. Each addition should be just unified before the next.
- 5If using butter, fold in cool-melted butter (40°C) in one addition after flour is fully incorporated.Butter creates a richer, more tender crumb in the légère variation. Hot butter would cook eggs; cold butter would seize.
- 6Pour into prepared pan (lined with parchment on the base; sides buttered and floured only if not using parchment). Bake at 175–180°C (350–355°F) for 20–25 minutes until golden, a skewer exits clean, and the top springs back firmly.Moderate heat ensures even rise without over-browning. The génoise is fully set when internal temperature reaches ~95°C.
Techniques that matter
Sabayon whisk (oeufs montée à blanc)
The warm whisk of eggs and sugar creates the foundational foam. Temperature control is critical — above 60°C risks scrambling, below 40°C risks insufficient sugar dissolution.
Ribbon-stage assessment
Proper ribbon formation indicates adequate air incorporation and protein coagulation. A batter that fails to ribbon will produce a dense, flat cake.
Gentle flour folding
The goal is incorporation without deflation. Each fold should sweep the bottom, turn the bowl, and repeat until just unified — typically 25–35 strokes per addition.
Pan preparation
Génoise sticks readily. Parchment on the base is standard; butter-and-flour on sides only if removing from a tube or springform.
Variations & derivatives
Génoise légère (butter génoise)France
Melted butter folded in last at 20–25% of batter weight. Moister, richer, slightly more tender. Common in elaborate layered cakes.
Panas / Pain de GênesProvence, France
Almond-paste-enriched génoise base, often baked in fluted molds, served as a tea cake. Adds 80–100 g marzipan per 300 g classic batter.
Biscuit (Italian method)Italy
Separates eggs; yolks whisked with sugar to sabayon, whites whipped to firm peaks folded in separately. Lighter and drier. Common for dacquoise bases and rolled cakes.
Sponge cake (British/American)Anglo tradition
Often adds chemical leavener and/or oil/butter for a more forgiving, softer crumb. Not technically a true génoise.
Used in these dishes
Substitutions
- Cake flour → All-purpose flour + 15% cornstarch, sifted together — Simulates low-protein cake flour's tenderizing effect. Use 85 g AP + 15 g cornstarch per 100 g flour needed.
- Whole eggs → 2 egg yolks + 1 whole egg per egg, adjusting sugar slightly — Produces a richer, more tender result but changes hydration and structure. Common in butter génoise.changes result
- Fine sugar → Caster or superfine sugar — Standard substitution; finer sugar dissolves faster and yields smoother foam.
Troubleshooting
Dense, flat cake with tunneling
Oven too hot (rises fast, collapses), batter overmixed after flour addition, or eggs not whipped to proper volume. → Lower oven to 170–175°C; fold more gently; ensure sabayon reaches full ribbon stage before adding flour.
Tough, rubbery texture
Too much gluten development from over-mixing flour or using high-protein flour (bread flour). → Use cake flour or AP+cornstarch; fold flour just until no streaks remain; stop mixing at incorporated.
Dome on top, gummy center
Too much heat on bottom; cake removed too early. → Bake on middle rack; ensure internal temp reaches ~95°C; cake should spring back firmly when pressed.
Sandwiched butter génoise greasy or with collapsed layers
Butter added too hot or incorporated into deflated batter. → Cool butter to 40°C; fold into properly whipped, still-aerated batter; do not fold butter if batter has already lost volume.