1/2 teaspoon salt (maybe; taste your gravy before you add salt)
1/4 teaspoon ground black pepper (optional)
Instructions
Preheat oven to 350 degrees.
Place frozen beef bones along with little bits and pieces of leftover saved beef into a roasting pan.
Add 1/2 cup water.
Roast the bones for 1 hour.
Remove from oven and discard bones or set the bones aside to use to make soup stock.
Eye-ball (measure) beef drippings in the pan and if it appears to be about a quarter cup, use the ratios above (in other words, keep your fat to flour ratio the same).
Place roaster on the stovetop and heat pan drippings over medium heat.
Add 1/4 cup of flour to the pan drippings and stir with spoon, getting all bits and pieces off the bottom of the pan and incorporated into the flour mixture.
Continue cooking over medium heat, stirring constantly, for about 2 minutes (this is to cook away the flour taste).
Add beef broth all at once, stir to combine and increase heat to high.
Bring to a boil, stirring constantly, reduce heat and continue cooking and stirring until mixture thickens and coats the back of a spoon.
Taste the gravy and correct the seasonings (add salt and pepper, if needed).