Creating Cast-Iron Mexican Street Corn Cream Cheese Dip is as simple as following these straightforward steps:

1. Preheat the Oven: Begin by preheating your oven to 375°F (190°C).
2. Prepare the Corn: If using fresh corn, grill or roast it until slightly charred. Slice the kernels off the cob. If using canned corn, drain and rinse the kernels.
3. Mix Ingredients: In a large mixing bowl, combine the softened cream cheese, sour cream, mayonnaise, chili powder, smoked paprika, garlic powder, onion powder, lime juice, salt, and black pepper. Mix until well blended and smooth.
4. Add Corn and Cheese: Fold in the corn kernels, Monterey Jack cheese, and half of the feta cheese into the cream cheese mixture until evenly incorporated.
5. Transfer to Cast Iron: Spoon the mixture into a pre-greased cast-iron skillet, spreading it out evenly.
6. Top with Cheese: Sprinkle the remaining feta cheese on top of the mixture, adding an extra layer of flavor.
7. Bake: Place the skillet in the preheated oven and bake for about 25-30 minutes or until bubbling and golden on top.
8. Garnish: Remove from the oven and let it sit for a few minutes. Garnish with chopped cilantro.
9. Serve: Serve warm with lime wedges and your choice of tortilla chips or fresh veggies.

Following these steps will ensure that you have the most incredible Cast-Iron Mexican Street Corn Cream Cheese Dip ready to impress your guests.