The type of apples you use will affect the final flavor of the apple butter. A mix of sweet and tart apples is ideal. Adjust the amount of spices to your liking. A pinch of nutmeg or allspice can also be added. For a smoother texture, peel the apples before cooking. Apple butter can be stored in airtight containers in the refrigerator for up to 2 weeks or frozen for up to 3 months. Canning the apple butter extends the storage time significantly. Follow proper canning procedures for safe preservation.