1 c. beef stock
1 tbsp. arrowroot

Put a couple tablespoons of stock in a cup and mix with the arrowroot. Heat the rest of the stock to a simmer, pour in arrowroot mixture and stir until it thickens.

1 cupful of gravy = 1/2 bread exchange - 34 calories. 1/4 cup (for one) has 8 bread exchange calories.