French Yogurt Cake

Preheat the oven to 350°F. Butter and flour an 8½ x 4½-inch loaf pan.

Combine the sugar and orange zest in a bowl and, using your fingertips, rub them together to distribute the citrus oils.

Whisk the yogurt and eggs together. Add the zesty sugar and vanilla and whisk to thoroughly combine. Add the flour, baking powder and salt and whisk just to combine.