In 1-quart heavy saucepan, heat 1 1/2 cups of the broth, the bouillon granules and pepper over medium heat, stirring constantly, until bouillon granules are dissolved.
In small bowl, stir remaining 1/2 cup broth and the flour, using wire whisk, until smooth. Gradually stir flour mixture into broth in saucepan. Heat to boiling. Cook, stirring constantly, until thickened and bubbly. Stir in a few drops of browning sauce if a darker color is desired.