Grandpa's mustache is a great cake with a funny name, because at first glance, due to its shape, it really resembles a mustache. The cake consists of yeast dough, jam and a walnut filling with egg whites. You can use any jam – this time I opted for a sour cherry jam, which turned out great. For the filling, walnuts can be replaced by poppy seeds, hazelnuts or cacao. The cake is easy to prepare, and there will be more than enough for everybody. The recipe makes two "loaves" and a 34 x 20 cm baking tin. If you want it to be bigger, double the ingredients and use a bigger baking tray.
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