In the bowl of a stand mixer fitted with the paddle attachment, beat the cream cheese, mayonnaise, sour cream, garlic, chopped artichokes, garlic salt, parsley, and both types of Parmesan cheese together until well combined.
16 ounces reduced-fat cream cheese, 1 cup mayonnaise with olive oil, ¼ cup light sour cream, 2 garlic cloves, 14 ounces canned marinated artichoke hearts, ½ teaspoon garlic salt, 1 tablespoon dried parsley, 1 cup grated Parmesan cheese, 1 cup shredded Parmesan cheese