Japanese castella (カステラ ka-su-te-ra, in Japanese) is a delicious and surprisingly easy honey sponge cake. Traditionally, a castella is made using 4 ingredients: honey, sugar, eggs, and bread flour. But I like to add a fifth, cinnamon, to give it a little spice. Castella has a more subtle sweetness than most western cakes and doesn’t use any frosting. It does pack a lot of sugar, but it’s not overpowering.

Castella doesn’t rely on any leavening agents like baking powder or salt, and there’s only a bit of oil used to coat the pan. The bread flour and whipped eggs are what primarily gives the cake its characteristic bounciness. Whipping the eggs is the most time-consuming and important part of the process. It’s ideal to use a stand mixer, but a hand mixer will do.

Cinnamon castella doesn’t have to be eaten right away. It stores very well in either the fridge or freezer. In fact, most of the time when making castella it’s recommended to wrap the loaf in plastic wrap and place it in the fridge overnight, but I understand if that’s too long to wait.