Found this on google.
Chipped Beef on Toast
Here is an official U.S. Army recipe for SOS:
CREAMED BEEF ON TOAST (SOS)
(a.k.a. Creamed Beef on Toast, S.O.S., Sh** on a Shingle)
Remember SOS? Of course you do! We’ve all eaten this culinary delight, and some even developed a taste for it. Depending upon who prepared it, SOS could be pretty good, especially if you were starving.
1/2 lb. ground beef
1/4 tsp. salt
1/4 tsp. pepper
4 tbsp. sifted flour
1 cup evaporated milk
1 cup water
2 tbsp. butter
Brown ground beef in its own fat. Remove excess fat and save for making roux. Season with salt and pepper. To make roux, place 2 tbsp. reserved fat in double broiler or heavy pan. Slowly add sifted flour, stirring constantly over low heat until thoroughly blended. Cook for five minutes. Do not brown. Combine milk and water. Add butter and scald (not burn) in double broiler or heavy pan. Add roux to scalded milk, stirring constantly until thoroughly blended. Add meat mixture and cook about 10 minutes, or until desired consistency. Serve on toast.
Of course, the real recipe used to feed the 1st Battalion, 50th Infantry at the Mess Hall had the measures written in buckets, shovels, fists and other measures that we’re probably better off not knowing. It was sort of like LRP Rations and C-rations, a liberal dosage of McIlhenny’s Louisiana Tabasco Sauce could render the most challenging meal tasty and (possibly) even nutritious!
Then we have the Marines recipe..
Marines Breakfast: Recipe for SOS
It is said that an army fights well on a full stomach, and the Marine Corps is no Exception. Always and foremost, in training or in combat, the breakfast meal is No. 1 for every grunt, Airedale and pinky at the start of the workday. Breakfast is the link to making it that day, and a breakfast without SOS is like a day without sunshine.
Over the years the recipe changed depending on the availability of supplies and the mood of the cook. Other branches of service also serve their versions of SOS, but they haven t mastered the Marines technique of preparing this marvelous breakfast presentation.
A number of years ago, a Marine artillery brigadier general requested/ordered that a recipe for the Marine Corps famous SOS (creamed beef on toast) be developed so that it could be served to a small group of about eight persons. This way the general could have his wife make it. The official recipe for mess halls is for serving 300 or more. The challenge of accurately paring down the recipe fell to the general s chief field cook, Master Sergeant Bernie Parker. After many tired and a few mistakes Top Parker came up with the following near-perfect recipe:
Recipe for Marine Breakfast
(Serves eight or two hungry Marines)
� pound ground beef (ground chuck for flavor)
1-tablespoon bacon fat (lard/Crisco or butter)
3 tablespoons flour
2 cups whole mile (add more milk if you want it thinner)
Pepper to taste
8 slices of dry toast
Using a large skillet (12-14 inches), crumb1e and brown the ground beef with fat and salt. Remove the pan from the heat and let cool slightly. Mix in the flour until all of the meat is covered, using all of the flour. Replace the skillet on the heat and stir in the milk. Keep stirring until the mixture comes to a boil and thickens (boil a minimum of one minute).
Serve over the toast. Salt and pepper to taste.