Best Slow Cooker White Chicken Chili

Step 1
Place tomatillos, onion, serrano pepper, and garlic in a hot cast iron skillet and cook until blackened, turning frequently, 7 to 10 minutes. Peel garlic cloves and transfer to a blender. Add the blackened vegetables, cilantro, and salt; blend until smooth.

Step 2
Place chicken broth, beans, chicken, cumin, and salt in a slow cooker. Pour in blended salsa. Cook on High until chicken is tender, 3 to 3 1/2 hours.

Step 3
Set oven rack about 6 inches from the heat source and preheat the oven's broiler. Line a baking sheet with aluminum foil. Place Hatch peppers with cut sides down onto the prepared baking sheet.

Step 4
Cook under the preheated broiler until the skin of the peppers has blackened and blistered, 5 to 8 minutes. Place blackened peppers into a bowl and cover tightly with plastic wrap. Allow peppers to steam as they cool, about 10 minutes.

Step 5
Remove 1 cup beans from the slow cooker; mash and stir back in. Remove chicken breasts and shred using 2 forks. Stir into the slow cooker. Peel broiled peppers and dice flesh into 1-inch pieces; add to the slow cooker. Sprinkle in Jack cheese.

Step 6
Cook until chili is warmed through, about 30 minutes more.