For best results, keep the heat low so the cheese melts gently and doesn’t seize or turn grainy, and if the dip gets too thick, whisk in 1–2 tablespoons of milk at a time until it reaches your preferred consistency. You can hold the finished dip warm in a small slow cooker on the “warm” setting, stirring occasionally to keep it smooth. Customize the flavor by adding cooked ground beef, sausage, or sautéed onions and peppers, and if you like more heat, stir in a bit of hot sauce or extra diced jalapeños. Store leftovers in an airtight container in the refrigerator for up to 3 days and reheat gently on the stove or in the microwave, stirring often and adding a splash of milk to bring back the creamy texture.