Grapefruit Greek Yogurt Cake

and 1/2 cups (190g) all-purpose flour

and 1/2 teaspoons baking powder

salt

large eggs

Greek yogurt1

packed light brown sugar

vegetable or canola oil (melted + slightly cooled coconut oil works too)

freshly squeezed Ruby Red Grapefruit juice, strained

and 1/2 Tablespoons grapefruit zest

pure vanilla extract

seeds scraped from 1/2 of a vanilla bean

confectioners' sugar, sifted

Tablespoons (30ml) freshly squeezed Ruby Red Grapefruit juice, strained

pure vanilla extract