Meyer lemon is the top choice for baking this easy lemon cake. It is tart as well as sweet with a flavour and colour that is between an orange and a lemon. Other lemon varieties you can use are Eureka and Lisbon which are two of the most widely available lemon varieties all over the world. These lemons are more tart and acidic. If using these lemons, you might need to increase the sugar by about a quarter cup to balance the tartness.