Chile Relleno Casserole (Easy, Cheesy, authentic Mexican Flavor Bake)

Ingredients

• 6-8 large poblano peppers.
• 2 cups Monterey Jack cheese, divided.
• 1 cup cheddar cheese, divided.
• 5 large eggs.
• 1 1/2 cups whole milk.
• 3 tablespoons all-purpose flour.
• 1 teaspoon baking powder.
• 1/4 teaspoon onion powder.
• 1/4 teaspoon garlic powder.
• 1/4 teaspoon salt.
• 1/4 teaspoon black pepper.
• Sour cream (for serving).
• Salsa (for serving).
• Fresh cilantro (for serving).