ngredients:
For Donut Batter:
1/4 cup butter, room temperature
1/4 cup oil
1/2 cup granulated sugar
1/3 cup tightly-packed brown sugar
2 eggs
zest from one orange
1 1/2 teaspoons baking powder
1/4 teaspoon baking soda
3/4 teaspoon salt
1 teaspoon vanilla
1 Tablespoon orange juice
2 2/3 cups all-purpose flour
1 cup buttermilk

For Glaze:
2 Tablespoons melted butter
1 Tablespoon orange juice
1 cup powdered sugar