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How to fix curdled cake batter

Beat in a spoonful of the flour from the recipe and the batter should come back together. Even if it stays slightly curdled, the cake will usually bake well when all the flour is folded in.

How you can tell

  • The mixture looks lumpy, grainy or like cottage cheese
  • Liquid separates from the butter and sugar
  • The mixture slides around the bowl rather than looking smooth and fluffy

Why it happens

When you cream butter and sugar and then add eggs, you're making an emulsion of fat and water. If the eggs are cold or added too quickly, the butter firms up and can't hold the liquid, so the mixture separates. This is called curdling. Flour absorbs the excess liquid and helps bind it back together. A curdled batter can give a slightly denser cake, but it is rarely a disaster.

How to fix it

Option 1Add a little flour

  1. Add a spoonful of the flour from the recipe
  2. Beat until the mixture looks smooth again
  3. Carry on adding the eggs a little at a time

Option 2Warm it slightly

  1. If the butter has firmed up from cold eggs, set the bowl over a pan of warm water for a moment
  2. Beat until smooth, then take it off the heat

Next time

  • Use butter and eggs at room temperature
  • Beat the eggs before adding them, then add them a little at a time
  • Beat well after each addition
  • Add a spoonful of flour with the eggs if the mixture starts to look curdled

Terms on this page

General kitchen guidance, not food-safety advice. If food may be unsafe, for example undercooked meat or anything left out too long, follow the Food Standards Agency and throw it away if in doubt.