Chile con Queso | Saveur

Ingredients

• 2 tbsp. unsalted butter
• 2 serrano chiles, stemmed and seeded, then diced
• 1 jalapeño, stemmed and seeded, then diced
• 1⁄2 medium yellow onion, diced
• 2 cloves garlic, finely chopped
• 2 tbsp. flour
• 1 cup milk
• 1 cup canned diced tomatoes, with juice
• 1⁄2 cup chopped fresh cilantro
• 3 cups grated cheddar cheese (about 12 oz.)
• 3 cups Monterey Jack cheese (about 12 ounces)
• 1⁄2 cup sour cream
• Kosher salt
• Tortilla chips, for serving