• 200 g (7 oz) butter
• 3 egg yolks
• juice of <

Melt the butter in a saucepan, keep it at room temperature.

Whisk the egg yolks in the top part of a double boiler with 3 tablespoons of cold water, until the mixture is pale and thick. (Important: the temperature mustn’t go over 80°C/176°F to prevent cooking the yolks.) Whisking continuousl