Pound Cake / Quatre-Quarts (1:1:1:1 Egg to Sugar to Flour to Butter)

1 part (e.g. 200 g, ~4 large eggs)

Eggs (whole, in-shell weight removed) — Eggs provide structure (protein), moisture, emulsification, and richness; use room-temperature eggs for best emulsion

1 part (e.g. 200 g)

Granulated sugar — Creates tenderness, sweetness, and a golden crust via Maillard and caramelization; caster sugar creams more finely

1 part (e.g. 200 g)

All-purpose flour — Provides starch network and gluten for structure; cake flour yields a softer crumb

1 part (e.g. 200 g)

Unsalted butter — Must be at true room temperature (68–72 °F / 20–22 °C) for proper creaming and air incorporation

Cream butter and sugar together vigorously until very pale, fluffy, and nearly white — this takes 5–8 minutes and is the critical aeration step. Add eggs one at a time, beating well between each to maintain the emulsion. Sift flour over the batter in two or three additions, folding gently to avoid deflating the air. Bake in a greased loaf or bundt pan at 325 °F (165 °C) until a skewer comes out clean, about 55–70 minutes for a 800 g loaf.

• Butter temperature is the single biggest variable: too cold and it won't cream; too warm and the fat separates instead of trapping air. Aim for 68–72 °F (20–22 °C).
• If the batter curdles when eggs are added (the emulsion breaks), the eggs are too cold. Warm the bowl briefly over hot water and beat vigorously to bring it back.
• Weigh the eggs in their shells then subtract 12–14% for an accurate net egg weight — or crack and weigh the eggs directly.
• A clean crack down the center of a pound cake loaf is traditional and desirable — score the top with a thin line of butter before baking to control it.
• Pound cake improves after one day, when moisture redistributes and the crumb sets fully; wrap tightly once cooled.
• The ratio scales infinitely — make a 50 g batch or a 500 g batch, it behaves identically.

• Lemon Pound Cake

  Add zest of 2 lemons and 2 tbsp lemon juice; finish with lemon glaze (powdered sugar + lemon juice)

• Marble Cake

  Divide batter; stir cocoa paste (cocoa + melted butter) into half; swirl together in the pan

• Almond Quatre-Quarts

  Replace 20–25% of flour with ground almonds for a moister, nuttier crumb

• Brown Butter Variation

  Brown the butter (beurre noisette) before using; allow to re-solidify; adds nutty, caramel depth without changing the ratio

• Breton Kugelhopf

  Quatre-quarts baked in a Kugelhopf mold with rum-soaked raisins folded in; regional variation from Alsace

• Génoise / Sponge Cake (1:1:1:1)

  Uses the same four-way equality but with whole eggs aerated over heat rather than creamed butter, yielding a lighter crumb

• Madeleines

  Quatre-quarts batter with added baking powder and browned butter; baked in shell molds

• Financier

  Almond-enriched brown-butter batter related to quatre-quarts but with no creaming step — a hot-fat method

• Cookie Dough (1:2:3)

  A fat-forward relative; drops eggs and shifts ratios toward pure short, crumbly texture

1. 1.Ratio: The Simple Codes Behind the Craft of Everyday Cooking — Michael Ruhlman
2. 2.The Oxford Companion to Food — Alan Davidson
3. 3.BakeWise: The Hows and Whys of Successful Baking — Shirley O. Corriher
4. 4.Pâtisserie: The Art of French Pastry — Christophe Felder & Camille Lesecq

Confidence: high