Great if you want homemade gravy, but don't want to make an entire batch each time.
6 tbsp butter/margarine
6 tbsp flour
4 cups chicken/beef/veggie broth (personal preference)
salt & pepper to taste
In a large skillet, melt butter, then whisk the flour into the butter. Just as the flour begins to brown, begin slowly adding broth, whisking to prevent lumps. Once all stock is in, bring to a boil while continuing to whisk. Remove skillet from heat, season with salt and pepper if desired. Allow to cool and freeze in portions. If you want single servings, freeze in an ice cube tray, then store in ziploc once frozen.