2 cups chicken broth
1/2 cup butter
1/3 cup flour
1/4 tsp salt
In a small bowl, stir the flour and salt together. Add 1/2 cup of broth with a whisk until smooth. Set aside.
In 1 quart saucepan, heat 1-1/2 cups of broth and butter to boiling. Reduce heat to medium.
Gradually whisk flour mixture into hot broth. It is important to use a whisk and consistently whisk it. Cook and whisk until thickened.