Can you add vanilla extract to a cake after baking?

It is generally not recommended to add vanilla extract to a cake after baking, as the heat from the oven will cause the delicate flavor of the vanilla to dissipate. For best results, vanilla extract should be added to the cake batter before baking. If you want to enhance the vanilla flavor of a baked cake, you can try brushing the surface with a simple syrup made with vanilla extract after it has cooled completely.