I have been looking for this same recipe and could never find it. But this one comes very close!

White Cheese Dip

1/2 lb white cheddar cheese
1 cup milk (approximately)
1/2 can diced chiles (i diced real small)
1/4 tsp cumin, to taste
1/2 tsp garlic powder, to taste

Combine all in pan, heat on med. until melted.