Pumpkin Sour Cream Donuts

Name: Pumpkin Sour Cream Donuts
Prep time: 20 min
Cook time: 20 min
Total time: 40 min
Cuisine: American
Ingredients: 3 1/2 cups all purpose flour; 4 teaspoons baking powder; 1/2 teaspoon baking soda; 1 teaspoon salt; 1 teaspoon ground cinnamon; 1/2 teaspoon ground ginger; 1/4 teaspoon ground nutmeg; 1/8 teaspoon ground cloves; 1 cup brown sugar; 3 tablespoons unsalted butter, room temperature; 1 large egg; 2 large egg yolks; 1 teaspoon vanilla extract; 1/2 cup plus 1 tablespoon sour cream; 1 cup canned pumpkin; Flavorless oil like canola (or I used avocado,) for frying; 1 cup sugar; 1 tablespoon cinnamon; 2 teaspoons ground nutmeg; 1 cup powdered sugar; 1 tablespoon maple syrup; 1-2 teaspoons heavy cream or milk