1 large egg

1 cup granulated sugar

6 ounces plain, vanilla, or chocolate yogurt (thicker Greek-style preferred, do not use diet, fat-free or light yogurt; sour cream may be substituted)

1/4 cup canola or vegetable oil

1 1/2 teaspoons vanilla extract

1/2 cup brewed coffee, room temperature or warm

1/2 cup unsweetened natural cocoa powder

1 cup all-purpose flour

1 teaspoon baking soda

1/2 teaspoon baking powder

1/2 teaspoon salt, optional