This fluffy, rolled German sponge cake filled with whipped strawberry cream is surprisingly quick and easy to make. It’s a go-to in our family for birthdays and as an afternoon treat, especially in late spring and summer when strawberries are in season. In fact, it was our littlest one’s first birthday cake—much less sweet than typical American birthday cakes—and Maximilian loved it! The recipe is flexible and can be adjusted to suit the season or your preferences (see