The recipe below is sufficient to frost the centre and top of a 23cm (9-inch) cake using a palette knife. If piping the frosting, I recommend at least doubling the quantities.
50g/ 4 TBSP dairy-free spread or vegan buttere.g. Vitalite, Flora, Pure
1– 1½ TBSP water
Instructions
Sieve the icing sugar and cocoa into a large bowl. Add the dairy-free spread/butter and 1 TBSP water. Stir with a metal spoon until it starts to combine, then beat with electric beaters until light and fluffy. If the frosting looks a little stiff, add another ½ TBSP water and keep beating.
This frosting will keep for a week in the fridge. It is also freezable.