Chocolate Glazed Doughnut Muffins

Name: Chocolate Glazed Doughnut Muffins
Ingredients: 2 3/4 cups all-purpose flour; 1 1/2 teaspoons baking powder; 1/4 teaspoon baking soda; 3/4 teaspoon salt; 1/2 cup unsalted butter, room temperature done; 2 tablespoons vegetable oil or olive oil done; 1/2 cup white granulated sugar done; 1/3 cup brown sugar done; 1/2 teaspoon freshly grated nutmeg; Scant 1/4 teaspoon ground cinnamon; 2 large eggs; 1 teaspoon vanilla extract; 1 cup milk; 1 cup powdered sugar; 3 tablespoons unsweetened cocoa powder; Pinch of salt; 3 tablespoons whole milk