Preheat your oven to 375°F (190°C).
In a large bowl, combine the spinach, artichokes, mayonnaise, sour cream, Parmesan cheese, half of the mozzarella, and garlic.
Mix the ingredients until well combined and transfer them into a baking dish.
Top with the remaining mozzarella cheese.
Bake in the preheated oven for about 20-25 minutes, until the cheese is melted and bubbly.
Serve warm with chips, bread, or vegetables.