by Emily Black | Photo by Rory Doyle
1 Ruby Red grapefruit 8 ounces unsalted butter 1 cup sugar 4 eggs 1 cup self-rising flour 1 teaspoon vanilla 1 tablespoon grapefruit zest 1 to 2 tablespoons milk Drizzle: Juice and zest of 1 Ruby Red grapefruit 1¾ cup sugar Sweetened whipped cream and zest for garnish...