Buttermilk Doughnuts

Details

Ingredients

• 2 cups vegetable oil for frying
• 2 cups buttermilk
• 1 cup white sugar
• 2 large eggs, beaten
• 5 cups sifted all-purpose flour
• 2 teaspoons baking soda
• 1 teaspoon baking powder
• 1 teaspoon salt
• 1 teaspoon ground nutmeg
• ¼ teaspoon ground cinnamon
• ½ cup melted butter
• 3 cups confectioners' sugar
• 1 tablespoon margarine, softened
• ½ teaspoon vanilla extract
• 2 tablespoons milk, or as needed