Pound Cake Day

What the day is

Pound Cake Day is observed on March 4. The name is the entire recipe, which was the point.

Origin and background

A pound cake is a pound each of butter, sugar, eggs and flour. That formulation, recorded in English cookery from the eighteenth century, survives because it needed no written recipe and no scales beyond a single known weight. A cook who could not read could hold the whole thing in memory and scale it by halving or doubling. The same logic produced the one-two-three-four cake and the ratios behind shortbread.

The original contains no chemical leavening, because none was available. All the rise comes from air beaten mechanically into the butter and sugar, which is why creaming is not a preliminary step in this cake but the structural one. Beating softened butter with sugar drives the sharp sugar crystals through the fat, cutting millions of small air pockets that expand in the oven. Rushing it, or using butter too cold to aerate or so warm it has gone greasy, produces a dense brick, and no amount of subsequent mixing recovers it.

Eggs then have to go in slowly. Adding them too fast overwhelms the emulsion and the batter curdles, which allows the trapped air to escape.

Modern versions frequently add baking powder and liquid, which makes them more forgiving and, strictly, no longer pound cakes. Madeira cake, the French quatre-quarts and many loaf cakes are all near relatives of the same idea.

The close-grained texture is what makes it the standard base for trifle and for grilling, since it holds together where an airy sponge collapses.

How to take part

• Use butter at cool room temperature, which should dent but not smear.
• Cream it far longer than feels necessary, until visibly pale.
• Add the eggs a little at a time and stop if it looks split.
• Weigh the eggs first and match the other three to them, which is the traditional method.
• Let it cool fully. Pound cake slices badly warm and keeps for days.