Serving size approximately 2 ounces = 1/4 cup.
Heat the oil and butter until butter is melted
Add flour and whisk. Cook until golden brown. About 3 minutes
Add chicken broth and reduce to low, whisking until smooth.
Add spices and continue summering.
Remove from heat and add chopped green chilies.
Slowly add cheese in batches, whisking until melted and smooth.
Whisk in sour cream. Keep warm, but do not let boil again.
2021 used white aged cheddar cheese