Stir in just enough cold water into the flour in a small bowl to make a thin paste. Do this using a fork or small wire whip.
Bring broth to a boil in saucepan over medium high heat.
Slowly stir in flour paste using a wire whip. Continue cooking until gravy thickens.
Season with salt and/or pepper ONLY after tasting to see if it even needs salt.
Reduce heat to warm and cover until ready to serve.
If gravy does not thicken, repeat the same process using maybe a tablespoon or 2 of flour and a tiny bit of water. NEVER add flour to liquid without first making a paste ir it will turn into lumps.
