For the Candied Grapefruit Peel:
1 grapefruit, peel intact
1 cup water
2 cups granulated sugar, divided

For the Cupcakes:
1 1/2 cups all-purpose flour
2 teaspoons baking soda
1/2 teaspoon kosher salt
1 cup sour cream or creme fraiche
1 cup + 3 tablespoons granulated sugar (divided)
3 large eggs, room temperature
2 teaspoons Chambord (or any other fruit liqueur)
zest of 1 large grapefruit
1/3 cup olive oil
1/2 cup fresh grapefruit juice

For the Glaze:
1 1/2 cups powdered sugar
3 1/2 teaspoons grapefruit juice