If your chocolate cakes come out a little dry from time to time, the solution may be one of the most unexpected items in your fridge: a cup of mayonnaise. To some, it's an old baking trick that's been around longer than cake mixes, but to others, it's an unexpected addition that can add moistness and richness, even if it sounds a little gross.
The mayonnaise trick is actually an old one, so if you've been baking for a long time or learnt from someone who's been baking for ages, you may know it already. Mayo is essentially oil, vinegar and egg, and while you could just add an extra egg to try and get the same effect, The Kitchn points out that the oil makes the cake tender, the egg helps the batter retain moisture, and the acid in the vinegar really brings out the chocolate flavour.
They go to the step of suggesting you make your own mayonnaise, something we've suggested before, but of course that's optional. Have you made a mayonnaise cake before, or does this just sound too out there for you? Whatever you think, let's hear it in the comments below.