Syllabub has been a popular dessert since at least the sixteenth century, as the Oxford English Dictionary lists the first recorded use at around 1537. It generally involves cream, alcohol, sugar and a flavouring, often fruit, though there are as many variations as there are cooks. It makes a fine dessert for a summer evening.
Here's my recipe. The mixture tends to splatter more than ordinary whipped cream, so a large mixing bowl is a good idea, and if using an electric whisk (and it would be hard work to whip by hand), use a slow speed to begin with and increase to higher speed after the mixture has started to thicken.
4 fl. oz (approx 100 ml) sherry, white wine or cider
0.5 teaspoon (0.5 x 5 ml spoon) ground nutmeg
3 oz (approx 75 g) sugar. I like light brown soft sugar for the warm colour and slight caramel flavour)
0.5 pint (approx 250 ml) double cream*
Put the lemon juice, lemon zest, sherry and nutmeg in a large bowl and leave to steep for an hour or two.
Stir in the sugar and mix until dissolved.
Pour in the double cream.
Whisk until the mixture is thick and standing in soft peaks (like ordinary whipped cream, or perhaps a bit softer).
Spoon into wine glasses or glass dessert bowls. I expect to get 6 or 8 portions out of this quantity, but it depends how big your wine glasses are.
Sprinkle with a little grated chocolate if liked. Chill in the refrigerator for at least a couple of hours, then serve.
*I think double cream is called heavy cream in the US