It typically happens when there is too much water in the mixture. Ice crystals can form when making homemade popsicles due to a process called recrystallization. Recrystallization occurs when the water in the popsicle mixture starts to freeze and then slowly melts and refreezes over time. To avoid this from happening, ensure you use full-fat coconut milk. The fat keeps the strawberry popsicles from becoming too icy in the freezer.