In a medium bowl, combine the spinach, artichoke hearts, cream cheese, mayonnaise, Parmesan cheese, mozzarella cheese, garlic powder, onion powder, salt, and pepper.
Mix until all ingredients are combined.
Transfer the mixture to an oven-safe dish.
Bake for 20 minutes, or until the dip is hot and bubbly.
Serve hot with chips or crackers.
Interesting Facts
Spinach is a great source of vitamins A, C, and K.
Artichokes are a good source of fiber and antioxidants.