Double-Apple Walnut Cake

Ingredients

• 4 c. all purpose flour
• 1 3/4 tsp. ground cinnamon
• 1 tsp. baking powder
• 1 tsp. baking soda
• 1/2 tsp. salt
• 3/4 tsp. ground nutmeg
• 3/4 c. chopped walnuts
• 1 1/2 c. butter, room temperature
• 2 1/2 c. granulated sugar
• 4 eggs
• 1 1/2 c. unsweetened applesauce
• 1 Granny Smith apple, peeled, cored, cut into 1/4 in. pieces
• 2 1/4 c. confectioners sugar
• 1/4 tsp. ground cinnamon
• 1/8 tsp. ground nutmeg
• 4 Tbsp. milk
• Apple slices and walnuts to Garnish (optional)