For the glaze, unlike the cake batter, the Amaretto will not be baked and the alcohol will not cook out. This means the Amaretto gives a bit of a boozy punch. If you want to leave out the alcohol, you can substitute the Amaretto with a half teaspoon of almond extract and a tablespoon of milk. You may need a bit more milk to reach your desired drizzling consistency, but add this a little at a time until you are happy with it.