Step 1

Preheat the oven to 350 degrees F.

Step 2

Put the tomatillos, onion, serrano, yellow chile and 3/4 cup water in a medium, heavy saucepan. Bring to a boil over medium-high heat. Cover and boil until the tomatillos turn olive-green color, about 10 minutes. Transfer the tomatillos, onion and chiles to a blender. Add the garlic and cilantro and blend until smooth. Season with salt and pepper.

Step 3

Heat the oil in a small skillet over medium-high heat. Fry the tortillas until golden but still pliable, about 10 seconds per side. Transfer to paper towels to drain.

Step 4

Put the tortillas on a work surface. Divide the shredded chicken evenly among the tortillas and roll up each like a cigar. Spread 1/3 cup sauce in a 9 by 13-inch glass baking dish. Arrange the enchiladas, seam-side down, in one layer snugly inside the dish. Pour the remaining sauce over the enchiladas.

Step 5

Drizzle with the Mexican crema and sprinkle the cheese all over. Bake until the cheese melts and starts to brown in spots, about 30 minutes. Serve immediately.