Melt butter in a saucepan over medium heat. Add flour and whisk together, making sure to get all visible lumps. Add salt and pepper. Cook over medium heat for 5 minutes or until mixture starts to turn light brown, be sure to stir constantly. Turn heat to low and SLOWLY add broth, stirring constantly. It will spit & bubble so be careful. Add Kitchen Bouquet. Turn heat back up to medium. Continue stirring until gravy boils and thickens.