Melt your butter or margarine in a medium sauce pan over medium heat. Listen for the sizzling and bubbling to stop. This is the moment when the water in the butter has evaporated and the browning begins.
Add an equal amount of flour immediately and begin whisking to form a thin paste. Cook and stir the flour and butter mixture until it begins to darken slightly.
Pour in the chicken stock while whisking constantly. If you are using 1/4 cup of butter and flour, add about 2 cups of chicken stock. Turn the mixture up to medium-high and keep whisking as it cooks. If it becomes too thick, add more chicken stock. If it is too thin, let it boil down until it reaches the desired thickness.
Remove the sauce pan from the burner and add the maple syrup to the gravy. Add a pinch of salt to bring out the flavor of the maple syrup and serve warm.