Rolled tortillas stuffed with chicken, drowned in sour cream sauce, buried under cheese. These high calorie enchiladas are Tex-Mex comfort at its most indulgent.
Preheat your oven to 375°F (190°C) and grease a large baking dish with butter or nonstick spray.
Melt 2 tbsp butter in a saucepan over medium heat, add diced onion, and sauté until translucent, about 5 minutes. Stir in the minced garlic and cook for 1 minute longer.
Sprinkle in all-purpose flour and cook, stirring constantly, for 1 minute to form a roux. Gradually pour in chicken broth and milk, whisking until smooth. Simmer for 3–5 minutes until slightly thickened.
Reduce heat to low; stir in sour cream, cumin, salt, and pepper. Simmer gently, ensuring not to boil to prevent curdling. Once sauce is creamy and hot, turn off heat.
Spread 1⁄2 cup of the sauce on the bottom of the baking dish. Lay out tortillas, fill each with shredded chicken and Monterey Jack cheese (reserving half the cheese for topping), roll tightly, and arrange seam-side down in the prepared dish.
Pour remaining sour cream sauce evenly over the enchiladas, then sprinkle with the remaining cheese.
Bake uncovered at 375°F for 25–30 minutes, until the cheese is melted and bubbling. Broil for 2–3 minutes for extra browning if desired.
Remove from oven, rest for 5 minutes, then sprinkle with fresh cilantro before serving to enhance color and flavor.