Preheat your oven to 375 degrees.

Thoroughly drain the thawed spinach and blot with paper towels to remove any extra moisture. Squeeze the spinach well and place in a mixing bowl.

In a large mixing bowl, combine the softened cream cheese, mayonnaise, sour cream, 1 cup shredded mozzarella, grated Parmesan, minced garlic, salt, black pepper, and red pepper flakes. Mix until well combined.

Drain chopped artichokes and fold into the mixture. Transfer to a 9-inch baking dish. Spread into the pan and top with the remaining 1 cup of cheese.

Bake in the preheated oven for approximately 25-30 minutes or until the edges are golden brown, and the dip is bubbly. Serve warm.

Serve with tortilla chips, crackers, bread cubes, or vegetable sticks.