Lemon Apple Filling

This filling can be made up to 3 days in advance and stored in an airtight container in the refrigerator. Stir gently before using to restore smooth consistency. If too thick after refrigeration, whisk in a few drops of water or lemon juice.

Store the filling in an airtight container in the refrigerator for up to 1 week. The filling can also be frozen for up to 3 months; thaw overnight in the refrigerator and stir well before using. Once spread on cake, store the assembled cake covered in the refrigerator for up to 3 days.