We recommend using a Feuerzangenbowle set with a sugar loaf, which you can buy on GermanBuy.net! How much sugar does the Feuerzangenbowle contain? So that the punch is not too sweet, you calculate with 1 sugar loaf per 1.5 liters (50.7 fl oz) of red wine. Place the sugar loaf on a pair of sugar tongs over the pot. Drizzle with some rum and light up. Before the flame goes out, add rum with .