Combine all of the ingredients, except for the coconut butter, in a saucepan set over medium-high heat.

Whisk until the sugar has completely dissolved, about 3 minutes.

Mixture should not come to a boil, or even to a simmer.

Pour mixture into a baking dish (I used an 11 x 7 inch dish).

Let cool at room temperature for about 10 minutes, and then place the dish in the freezer until ice crystals form around the edges, about 1 hour.

Using a fork, scrape the ice crystals on the edges towards the center of the dish.

Place the dish back in the freezer, and freeze an additional 1 hour.

Repeat until ice crystals have developed throughout the mixture (about 4 hours total freezing time).

Spoon granita into glasses or serving dishes, drizzle with coconut butter (if using), and serve immediately.

Nutritional Information Per Serving (without the coconut butter): 152.7 calories, 0 grams fat, 44.7 grams total carbohydrate, 1.2 grams fiber, 39.2 grams sugars, 1.3 grams protein