Creating Creamy Spinach Dip is straightforward if you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Prepare Spinach: If using fresh spinach, wash and chop it finely. If using frozen, ensure it’s thoroughly thawed and drained.
3. Mix Base Ingredients: In a large mixing bowl, combine the softened cream cheese, sour cream, and mayonnaise. Mix until smooth and well-blended.
4. Add Cheese: Stir in the shredded mozzarella and grated Parmesan cheese into the cream mixture.
5. Season: Add the minced garlic, onion powder, salt, black pepper, and red pepper flakes (if using). Mix well.
6. Incorporate Spinach: Fold the prepared spinach into the cheese mixture until evenly distributed.
7. Transfer to Baking Dish: Pour the spinach dip mixture into a greased baking dish, spreading it evenly.
8. Bake: Place the dish in the preheated oven and bake for 20-25 minutes, or until the top is bubbly and golden brown.
9. Cool Slightly: Remove from the oven and let it cool for a few minutes before serving.
10. Serve Warm: Enjoy with your favorite dippers such as tortilla chips, pita bread, or veggie sticks.

These clear steps will guide you in creating this incredible dip effortlessly!