Nutmeg Cake

Ingredients

• 12 tbsp. unsalted butter, cubed, plus more for pan
• 3 cups flour, plus more for pan
• 4 1⁄2 tsp. freshly grated nutmeg
• 2 tsp. baking powder
• 1 tsp. ground cinnamon
• 3⁄4 tsp. baking soda
• 1⁄2 tsp. kosher salt
• 2 cups packed light brown sugar
• 1 1⁄2 cups sour cream
• 1 cup milk
• 2 eggs, beaten
• 1⁄2 cup finely chopped walnuts
• Confectioners' sugar, for dusting