Good-Cooking - Caramel Cake with Caramel Nut Frosting

Ingredients

• 1/2 cup butter
• 1 1/4 cups granulated sugar
• 4 eggs
• 2 1/2 cups cake flour
• 2 teaspoons baking powder
• 1/2 teaspoon salt
• 1 cup milk
• 1 teaspoon vanilla extract
• 3 cups granulated sugar
• 1 (12 fluid ounce) can evaporated milk
• 1 pinch salt
• 1 cup chopped walnuts