This peanut butter board is best enjoyed immediately. Depending on the toppings you use, the leftovers may not store well because of all the mixing and dipping. Sliced fruits may soften and turn brown if simply placed in the fridge. You may be able to store leftovers if you remove the fruit and any dairy toppings. Cover the board in plastic wrap and put it in the fridge for up to 1 additional day for the best freshness.