3 tablespoons flour
2 cups chicken stock
1/2 cup apple cider
Salt and freshly ground black pepper
Heat a saucepan over medium-high heat. Melt the butter then stir in the flour and cook until light brown, about 1 minute.
Whisk in the chicken stock and apple cider, and season with salt and freshly ground pepper. Continue whisking and cook until thickened, about 3 minutes.