Butter Cake with Caramel Frosting

Ingredients

• 3 cups cake flour plus additional for preparing pans
• 1 cup unsalted butter (2-sticks), plus additional for preparing pans
• 3 teaspoons Baking Powder
• 1 teaspoon Salt
• 2 cups superfine sugar
• 4 large Eggs
• 1 cup Whole Milk
• 1 1/2 teaspoons Vanilla extract
• 1 teaspoon lemon extract
• 1/2 teaspoon Almond extract
• 1/2 cup unsalted butter (1-stick)
• 2 cups dark brown sugar firmly packed
• 1/8 teaspoon Salt
• 1 teaspoon Vanilla extract
• 3 cups confectioners sugar sifted, (up to 4)
• 8 to 10 tablespoons Heavy cream
• 2 cups black walnuts toasted and finely chopped, for garnish (optional)