Note: I juiced about 6 large grapefruits to get 5 1/2 cups.
Combine 1 cup of grapefruit juice and all of the sugar in a saucepan over medium heat. Whisk until sugar dissolves, cooking for about 5-6 minutes. Remove from heat and pour in a large bowl, mixing it with the remaining grapefruit juice. Refrigerate for 25 minutes, or until chilled.
Once chilled, pour the mixture in your ice cream maker and churn according to the directions. I used the attachment for my KitchenAid and churned it for 25 minutes. After churning, pour in a container (…or loaf pan, ha) and freeze for 6-8 hours until frozen.
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