¼ cup granulated sugar
6 tablespoons unsalted butter, melted
½ cup fresh Key lime juice (or regular lime juice, see note)
1 tablespoon Key lime zest
1 cup heavy cream
2 tablespoons powdered sugar
½ teaspoon vanilla extract
Find it online: https://www.thestationrecipes.com/mint-chip-milkshake-recipe-2/