01 - Set oven temperature to 350°F.
02 - In a large bowl, blend cream cheese, sour cream, and mayonnaise until smooth.
03 - Fold in mozzarella, Parmesan, spinach, artichoke hearts, and minced garlic until evenly mixed.
04 - Incorporate salt, black pepper, and red pepper flakes if desired.
05 - Spread mixture evenly in an 8x8 inch baking dish.
06 - Bake for 25 minutes until hot, bubbling, and lightly golden on top.
07 - Remove from oven and let cool briefly before serving with chips, crackers, or baguette slices.