In a large bowl, beat together the cream cheese, mayonnaise and sour cream with a hand mixer until smooth.
Stir in the 3/4 cup pepper jack, 3/4 cup cheddar, parmesan, onion, garlic, worcestershire, garlic powder, onion powder, cayenne, lemon juice, salt and pepper until thoroughly combined.
Fold in the spinach and artichokes. Transfer to a small baking dish and sprinkle the top with the remaining cheese.
Bake in the oven for 20-25 minutes until golden brown and bubbling.
Serve hot with crackers, crostini or vegetables.
Video
Notes
Dip can be assembled and stored in the refrigerator in an airtight container for up to 3 days before baking. Store leftover BAKED dip in an airtight container for up to 3 additional days.