Cara Cara oranges, available late winter to early spring, look like regular oranges on the outside, but they are red inside, much like a ruby red grapefruit. In fact, if you buy one by mistake, believing it a regular orange, you might think you’ve gotten a small grapefruit when you cut into it. They are sweet and a little tangy, though, not sour/tart like a grapefruit.
I based my cake on Martha Stewart’s Orange-Yogurt Cake recipe, making a small heart-shaped cake and a few cupcakes. This was a simple, light cake, finished with powdered sugar and served with orange slices and zest strips.
I do not have a lemon zester that allows for peeling thin strips of zest, so I removed some zest with a knife and cut it into thin slices, which worked fine.
Cutting orange segments always reminds me of my grandmother, who taught me the method (thekitchenista.com has a nice tutorial).
This cake would probably work well with any kind of citrus. I’m sure it would be a lovely summertime dessert with regular oranges or lemons. I served it after a heavier winter meal when a rich, frosted cake would have been overkill.