Blanch the spinach. Place spinach in hot water until it's fully cooked.
Transfer spinach to a bowl of ice water to stop cooking. Drain well.
Finely chop the spinach, then combine with cream cheese, sour cream, parmesan cheese, mozzarella, and seasonings in a bowl. Mix until well combined.
Spread the mixture evenly into an oven-safe dish.
Sprinkle extra mozzarella cheese on top.
Bake at 400°F for 15 minutes.
Broil for a few minutes until the top is golden.
Pair with chips, crackers, or toasted bread. Enjoy!