Put the water and sugar into a brass pan and heat gently. Cream the butter. When the sugar is dissolved, add the butter. Keep stirring over the heat until it sets, when a little is poured on to a buttered dish.
Easy, no real cooking required, lovely liqueur truffles. No eggs or cream like a lot of truffle recipes so keep well too. Great as homemade gifts or just to treat yourself for a lot less than buying Thorntons!