Step by step

Beat the eggs with the sugar

Tips
If you want to get a two-tone effect, do not mix the two doughs when you pour one on top of the other in the mould. If you want to achieve a particularly marked marbling effect, mix the two doughs together with the prongs of a fork.
Trivia
There are many commercially available cake moulds with a double hinge, with which you can easily create a traditionally round doughnut. Get one for yourself: in this way you spend only once and you’ll be able to make cakes of different types.