Stollen improve with maturity—a Christmas Stollen will be nicely aged at carnival time, although some German families keep the last piece to be eaten at Easter.
Sieve two-thirds of the flour into a warm bowl. Pour a little warm milk over the yeast in a cup, sprinkle in a teaspoon of sugar, and leave it for a moment or two to liquidize.
Make a hollow in the flour and pour in the yeast mix. Sprinkle with flour and leave for 10-15 minutes to start the sponge working. Pour in the rest of the milk and work in the flour, dra