Cakes that contain sour cream are almost guaranteed to be good. I first heard about this one on the Home Cooking podcast. Samin Nosrat was raving about it so I paid attention. Samin - of chocolate midnight cake and Ligurian foccacia fame - is someone to be taken seriously. In addition to the sour cream and Samin's seal of approval, this cake also had going for it that it was super simple and featured lemons, which are cheap and plentiful right now in Australia. When I made it I wasn't disappointed - it's zippy with citrus, unbelievably soft from the coconut milk and sour cream, and in squares, easily transportable. I made it one weekend to take up to the Blue Mountains on a day trip, and the very next weekend to take across town on the train for dinner at a friend's. Its other advantage is that because it's an oil-based cake, it keeps really well and I imagine would freeze well too. Should you have any left over. I can almost guarantee you won't.