Meanwhile, prepare Sauce by melting butter in olive oil in a medium saucepan over medium heat. Whisk in flour and cook, stirring constantly for 3 minutes. Reduce heat to low then gradually whisk in chicken broth. Add spices and bring to a simmer while stirring until thickened, about 2-3 minutes. Remove from heat and stir in green chilies
, cheese until melted then sour cream. Add hot sauce to taste (optional).