Melt 2 tablespoons of butter on medium heat and when the butter starts to turn a little brown, reduce the heat to medium-low. Then add 1/4 cup of all-purpose flour to the melted butter and stir thoroughly. After that, add half of the 2 and 1/2 cups of chicken broth, stir, then add the other half of the broth. Keep stirring. Add a couple of pinches of salt and pepper at first, then stir. Taste to see if you need any more salt or pepper to your taste. Bring to a boil, reduce the heat to low, and let the gravy thicken, while you keep stirring.