Lemon and Grapefruit Buttermilk Cake, infused with lemon zest and the juices of both grapefruit and lemon, topped with a citrus glaze and lemony icing.
Spray the inside of a bundt pan with cooking spray and set aside.
Whisk, flour, baking powder and salt together in a medium bowl. Set aside.
Combine sugar, lemon zest and butter together in a large bowl.
Add in the eggs, one at at time, beating after each addition and scraping down the bowl with a rubber spatula as needed.
Add in the vanilla and the juices and continue mixing for about 30 seconds longer.
Reduce mixing speed to low and add dry ingredients in 3 additions, alternating with buttermilk in two additions, beginning and ending with dry ingredients.
Pour into prepared pan and bake for 45-50 minutes or until toothpick inserted in the center of the cake comes out clean.
Place the pan on a cooling rack and cool, about 30 minutes.
Carefully invert the cake onto rack; remove pan and let cake cool completely.
While the cake is cooling, prepare the glaze.
TO MAKE THE GLAZE
Combine 1/3 cup of grapefruit juice with 1/3 cup sugar in a small saucepan and cook over low heat until the sugar dissolves. Spoon the grapefruit syrup over the cake.
TO MAKE THE ICING
Whisk together the powdered sugar and the lemon juice until smooth. (If the icing seems too dry, add a little more lemon juice. It the icing appears to watery, add a tiny bit more powdered sugar until the desired consistency is achieved).