In a pot, melt butter on medium heat. Once butter is melted (not brown or burned), add flour.
Use a whisk to whisk flour and butter, then slowly add chicken stock to pot while whisking. Add chicken bouillon and Worcestershire sauce.
Bring to a boil, then let it simmer under medium low heat for 3-5 minutes, or until gravy thickens to desired thickness. Add more chicken stock to thin out gravy, or more flour to thicken if needed.
Taste gravy, and add salt and black pepper to taste.
Pour into gravy boat and serve! Enjoy!
Notes
To make gravy with drippings, substitute drippings for salted butter. Start with just half of a chicken bouillon and add more if needed. Salt may not be necessary as well.