For the most intense lemon flavor, use Meyer lemons if available. Don't overmix the batter once the flour is added, as this can result in a tough cake. A high-quality extra virgin olive oil is key to the cake's flavor, but avoid oils that are too peppery or bitter. The cake tastes even better the next day, as the flavors have a chance to meld. Store leftover cake in an airtight container at room temperature for up to 3 days.