01 -
Pour the corn syrup onto a small plate and place the coconut flakes on a second plate. Dip the rim of each glass into the syrup, then press into the coconut to coat.
02 -
Add the pineapple juice, cream of coconut, lime juice if using, ice, and 5 drops of blue food coloring to a blender.
03 -
Blend on high until the mixture is smooth, thick, and slushy, about 30-45 seconds. Stop and scrape once if needed.
04 -
Add more blue food coloring 1 drop at a time for a deeper blue. Add a few ice cubes for a thicker drink or a splash of pineapple juice if it is too thick to pour.
05 -
Pour immediately into the coconut-rimmed glasses. Garnish with pineapple wedges or cherries if desired and serve while icy.