Pink Grapefruit Yogurt Cake

Ingredients:
2 cups all-purpose flour
1 Tablespoon baking powder
1/4 teaspoon salt
2 eggs
3/4 cup granulated sugar
1 cup plain whole milk yogurt
1/3 cup vegetable oil
Juice and zest of 1 pink grapefruit. This ends up being about 1/2 cup of juice and 1 Tablespoon of zest.
1 teaspoon vanilla extract
3 Tablespoons powdered sugar

Directions:
Position a rack in the center of the oven and preheat the oven to 350 degrees F. Grease a 10-inch round springform pan and line the pan bottom with a parchment paper round and set aside. (I used a stoneware mini-bundt pan, and sprayed it well with non-stick baking spray.)
In a medium bowl, whisk together the flour, baking powder and salt to blend.
On a clean surface, or in a large bowl, combine the granulated sugar and zest. With the back of a spoon or a flexible bench knife, rub the grapefruit zest into the sugar. The essential oils will release into the sugar creating a beautifully fragrant sugar.
In a large bowl, beat the eggs and grapefruit sugar until the eggs are thick and pale yellow. Add the yogurt, oil, 1 Tablespoon of grapefruit juice and vanilla extract. Stir well to combine. Add the flour mixture and stir to combine.
Pour the batter into the prepared pan, smoothing the top with a rubber spatula. Bake for 30-40 minutes, or until the top is golden brown and a wooden skewer comes out clean when inserted near the center. Place the pan on a wire rack for 10 minutes to cool. Run a knife around the edge of the pan to loosen the cake Release and remove the pan sides. Cool completely on the wire rack.
In a small saucepan, combine the powdered sugar and the remaining grapefruit juice and bring to a boil Reduce the heat to a simmer and cook, stirring, for 10 minutes, or until the glaze is slightly thickened. Remove from heat.
To finish the cake, invert the cooled cake and remove the pan bottom. Carefully peel away the parchment paper if you used it. Reinvert the cake onto a serving plate. Pierce the cake all over the top with a skewer and pour the warm grapefruit slowly over the cake. If desired, use a pastry brush to help spread the syrup.
Store at room temperature, wrapped well for 2 days.