Always zest lemons BEFORE cutting them to juice. This may sound obvious, but is an easy mistake to make and it is really no fun trying to zest a squishy lemon half!
Zest lemons directly into the mixing bowl. Doing this ensures you not only get all the zest in, but also any of the flavourful oils off the fruit too. Trust me, it makes a huge different to the flavour you will get in the finished cake!
Ensure ingredients are at room temperature. Softened butter is much easier to mix in and will result in a better cake, and room temperature eggs and yogurt will mix better with the other ingredients for better final results.
If you wish to control where the lemon loaf cake cracks during baking, simply dip a knife in some melted butter or a little oil and pull it through where you want the crack to be. This will cause the mixture to separate in that space during baking, resulting in a split in the cake where you want it to be.
The lemon syrup can be made once the loaf cake comes out of the oven, but it is important you put it on the cake whilst it is still warm at least. The warm cake absorbs and disperses the syrup much better than a cold cake would, so do it as soon as possible once removed from the oven.
The final lemon sugar drizzle on top of the cake is completely optional, the cake is delicious without it! However, I think it is so pretty, and gives an extra lemon sugar kick, so I always add it on.