Drain and chop the artichoke hearts. Thaw and drain/squeeze out excess water from spinach.
10 oz frozen spinach, 1 can artichoke hearts
In a medium bowl, combine the cream cheese, sour cream, mayonnaise, garlic powder, salt, pepper, and red pepper flakes. If the cream cheese is still cold, it will be hard to mix everything together. However, you can use a hand mixer or stand mixer to combine everything if need be!
8 oz cream cheese, ½ cup sour cream, ½ cup mayonnaise, 2 tbs garlic powder, ½ teaspoon salt, ½ teaspoon pepper, ½ teaspoon red pepper flakes
Add in the spinach, chopped artichoke hearts, mozzarella, and parmesan, stirring until well combined.