from: Everyday Food, Jan/Feb 2003
Ingredients
10 tablespoons (1 ¼ sticks) unsalted butter
¾ cup light-brown sugar
2 small pink grapefruit
1 ½ cups flour
1 ½ teaspoons baking powder
1 teaspoon ground cinnamon
¾ teaspoon ground ginger
½ teaspoon baking soda
¼ teaspoon ground allspice
½ cup granulated sugar
2 large eggs
1 teaspoon vanilla extract
½ cup milk
whipped cream (optional)
Directions
Preheat oven to 350. Put 4 tablespoons butter in a 9-inch round baking pan. Place the pan in the oven just long enough to melt the butter. Remove pan from oven; scatter ½ cup brown sugar evenly over the melted butter.
With a sharp knife, peel the grapefruit, removing all pith (the white stuff). Slice into small rounds. Arrange the slices to cover the bottom of the pan. In a bowl, stir together the flour, baking soda, and allspice. In a separate bowl, using an electric mixer, beat remaining butter until creamy. Add granulated sugar and remaining ¼ cup brown sugar; beat until well combined. Beat in eggs one at a time. Beat in vanilla. Alternately add dry ingredients and milt to butter mixture, beginning and ending with dry ingredients.
Pour batter over grapefruit in pan. Bake 45 minutes or until a toothpick inserted in center comes out clean. Cool 5 minutes; turn cake out onto serving plate. Serve warm or at room temperature with whipped cream if desired.