Apple Dessert Pizza with Caramel Cream Cheese Frosting - Diamond Nuts

Ingredients

• Filling
• 1/2 cup unsalted butter, softened to room temperature
• 3/4 cup granulated sugar
• 1 large egg, at room temperature
• 1 teaspoon pure vanilla extract
• 1 1/2 cups all-purpose flour, spoon & leveled
• 1/4 teaspoon salt
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1 teaspoon ground cinnamon
• Topping
• 1/3 cup Diamond of California chopped walnuts
• 2 medium apples, thinly sliced
• 8 ounces brick-style cream cheese, softened to room temperature
• 1/4 cup unsalted butter, softened to room temperature
• 1 1/2 cups confectioners' sugar
• 1/2 cup store-bought or homemade caramel sauce, divided