Combine chicken broth and 1/2 cup of milk in a large saucepan over medium high heat.
Bring to a low boil. Reduce heat to medium low.Meanwhile, in a separate bowl, whisk flour and seasonings together.
Pour in the remaining 1 cup of milk. Whisk until smooth and no lumps remain.
Pour milk/flour/seasoning mixture into saucepan with broth mixture. Whisk and stir constantly as mixture simmers.
Continue to let simmer until mixture is smooth and thick - about 10 minutes.
Freeze or refrigerate (up to a week) or use immediately
