I have searched many sources for authentic corned beef/pastrami and gave up! Too many conflicting ingredients and procedures. So I finally got off my butt and opened the good ole stand by - Joy of Cooking, cookbook.
Corned Beef
This salted beef actually has nothing to do with corn but got its name in Anglo-Saxon times when a granular salt the size of a kernel of wheat—“corn” of course to a Briton –was used to process it. To corn, combine:
4 quarts hot water
2 cups coarse salt
1/4 cup sugar
2 tablespoons pickling spice
1-1/2 teaspoons saltpeter or sodium nitrate,
When cool, pour over;
A 5-lb. piece of beef: brisket or tongue
which has been placed in a deep enameled pot or stoneware jar. Add:
3 cloves garlic
Weigh meat to keep it submerged, and cover pot.
Cure in refrigerator 3 weeks, turning meat every 5 days.
To cook for corned beef, wash under running water to remove surface brine; Cover with boiling water and simmer, allowing about 1 hour per pound, or until a fork can penetrate to center. Always slice corned beef thin.
For Pastrami
To convert the corned beef to pastrami, do not boil, the meat must be smoked. After brining wash under running water to remove surface brine, commercial pastrami is cooked entirely by hot smoking. At 320 degrees for 6 top 7 hours, using plenty of oak and or hickory chips.
I bought a jar of McCormick Pickling Spice and the ingredients were as follows, cinnamon, allspice, mustard seed, bay leaves, ginger, chillies, cloves, black pepper, mace, cardamom and sulfiting agents.
Regards, Mike Willsey