Grapefruit vanilla cake recipe

Ingredients

• 1 1/2 cups all-purpose flour
• 2 teaspoons baking powder
• 1/2 teaspoon kosher salt
• 1 cup plain whole-milk yogurt
• 1 cup plus 1 tablespoon sugar
• 3 extra-large eggs
• 3 teaspoons grated grapefruit zest (approximately one large grapefruit)
• 1/2 teaspoon pure vanilla extract
• 1/2 cup vegetable oil
• 1/3 cup freshly squeezed grapefruit juice
• 1 cup confectioners sugar
• 2 tablespoons freshly squeezed grapefruit juice