01 - Preheat your oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, baking soda, baking powder, and salt until well blended.
03 - In a large bowl, combine sugar, melted coconut oil, grapefruit juice, grapefruit zest, vanilla extract, and plant-based milk. Whisk until smooth and fully incorporated.
04 - Gradually add the dry ingredients to the wet mixture, stirring just until combined. Avoid overmixing to prevent tough cookies.
05 - In a small bowl, mix the rolling sugar with extra grapefruit zest for coating.
06 - Scoop tablespoon-sized portions of dough, roll into balls, and coat each in the sugar mixture.
07 - Place dough balls 2 inches apart on prepared baking sheets. Gently flatten each ball with your palm or the bottom of a glass.
08 - Bake for 9-11 minutes, until edges are set and centers appear slightly underbaked.
09 - Cool on baking sheets for 5 minutes, then transfer to a wire rack to cool completely.