Lisa Fain’s Sour Cream-Chicken Enchiladas

Preheat oven to 350 degrees Fahrenheit. Season chicken with salt and pepper, toss with 2 tablespoons oil, and bake in a cast-iron skillet until cooked through, about 30 minutes. Let cool, shred, and set aside. 

Meanwhile, in a large pot over medium-low heat, melt butter. Add chiles; cook until soft, about 4 minutes. Add garlic; cook for 1 minute. Whisk in flour for 1 minute. Whisk in broth until thickened, about 6 minutes. Stir in sour cream, ¼ cup cilantro, cumin, and cayenne. Transfer to a blender, add tomatillos, and puree. Pour 1 cup mixture in each of 2 buttered 9-by-13-inch baking dishes. 

In a large skillet over medium heat, heat 1 ½ teaspoons oil and cook tortillas in batches until soft, about 1 minute per side, adding oil as needed. Place ¼ cup reserved chicken, 1 tablespoon cheese, and 1 teaspoon onion on each tortilla and roll into a cigar shape. Place in baking dishes and cover with remaining sour cream mixture and cheese. Bake until top is lightly browned, about 25 minutes. Garnish with remaining cilantro.