Gather your mise en place; get together all of you equipment needed for the recipe and gather your ingredients.

Peel the watermelon and cut into 3 or 4 centimeter cubes, then place on a baking sheet lined with parchment and put into the freezer. Let watermelon freeze completely before using, at least 3 – 4 hours.

Place all ingredients except for water into a blender on medium speed. You may need to blend in batches, do not overfill the blender. 

Add water and continue to blend until the slushie is desired consistency. 

Enjoy this refreshing, frosty beverage!