• 1 medium egg
  • 2 tablespoons milk
  • 3 tablespoons vegetable oil
  • 1 teaspoon instant coffee
  • 4 tablespoons self-rising flour
  • 4 tablespoons caster sugar
  • 25g California walnuts, chopped


  1. Beat the egg in a 350ml heatproof mug with the milk and oil. Blend the coffee with 1 teaspoon boiling water and add to the mug with the flour, sugar and all but 2 teaspoons walnuts, mix well to combine.
  2. Microwave on full power for 2-3 minutes or until a skewer comes out clean. Allow to cool.
  3. Sprinkle with reserved walnuts.