framboise eau de vie (optional)
icing (confectioner’s) sugar to taste
1 Put the raspberries in a blender or food processor with the framboise eau de vie, if using. Blitz until puréed.
2 Press the purée through a fine sieve, until nothing is left but the pips.
3 Sweeten with sugar to taste and chill in the refrigerator until needed.