Add more icing sugar a spoonful at a time, beating well each time.
Continue until you have a smooth paste which leaves a point when you lift the whisk out.
Stage 5
Your royal icing is ready for use, to coat a cake or sweets, like calissons, for example.
Remarks
The proportions of egg white and sugar are fairly approximate. It is important to arrive at the right pasty texture, whatever weight of sugar you are using.
The lemon juice gives a brighter whiteness, but you can colour royal icing with a few drops of food colouring if you prefer.
Keeping: 1 or 2 days in the fridge in a sealed container.
Calissons are a sweet from Provence - Aix-en-Provence is famous for them - made with almonds and candied fruit, covered with royal icing. This is a slightly simplified version, which is every bit as good. 159 K 53.3 1 hour 30 min.