Boil vegetable broth to a boil in a large pan.
In a bowl, whisk together milk and flour until flour is dissolved.
Add in remaining ingredients and continue whisking until incorporated.
Add the milk/flour mixture to the broth, whisking to combine.
Reduce heat to medium, allow to cook until thickened (3-5 minutes) stirring constantly.
Remove from heat.
Use immediately or store in airtight container in refrigerator.