Lemon Frosting

• 90 g / 3 oz butter
• 1 small lemon
• 230

In a small glass or stainless steel pan, melt the butter with 3 tbs of the strained lemon juice. Bring to the boil, allow to bubble for 30 seconds, then remove from the heat and cool for 1 minute. Stir in the icing sugar and beat until smooth. Stand the pan in cold water for one minute to cool the f