Beat the egg, vanilla sugar, cinnamon and camel milk loose in a deep plate. Roll the slices of bread into the egg mixture 1 by 1 and stack them on a plate. Pour the rest of the egg mixture over the bread stack. Let it soak for a moment. Heat half the butter in a frying pan and fry the half stack of toast within 5 minutes until golden brown. Turn them halfway. Remove from the pan, heat the remaining butter and fry the rest of the French toast until golden brown.