Keep this caramel apple eclair cake refrigerated for best results. It has a three- to four-day shelf life if sealed in plastic or another airtight container.
If you use full-fat dairy products, your eclair cake will freeze well for up to a month. Since low-fat dairy products separate more readily when frozen, they aren’t as effective. Before freezing, place the cake in an airtight container or wrap it in plastic. Place in the fridge to thaw.