By transferring the beef broth to a strainer, any particles can be extracted. The broth is poured into a skillet.
In a small basin, combine 3 tablespoons of the broth that was drained and added to the cornstarch; whisk until thoroughly combined.
After bringing the broth to a simmer in the skillet, whisk in the cornstarch mixture. Stir in the thickening agent.
Adjust the amount of salt and pepper to flavor.