Meat may often be the most expensive ingredient on the centre of the plate. It is sensible therefore to cook it in a way that maximises the yield of each portion, and minimises cooking losses.
How much do you need?
An average cooked serving of meat weighs 140 - 160g. The amount of raw meat required for that serving depends on how much the meat shrinks during cooking as well as the particular cut, its size, fat and bone content and the degree of doneness. Generally, cooking losses range from 1/4 to 1/3 of the raw meat weight. Remember, cooking losses in small roasts and portion cuts tend to be greater than in larger cuts.
There are two kinds of cooking losses. Yields may be reduced by cooking/shrinkage losses and by wastage in carving and serving. The cooking or shrinkage loss is the actual weight difference between the uncooked cut and the cooked meat before it is carved.
Slicing and serving losses are due to fat trim, poor carving, or smaller portions that are not suitable for serving. Shrinkage occurs when water evaporates from the surface of the meat and when fat, water and juices drip from the meat. Shrinkage is affected by cooking method, duration and temperatures, and degree of doneness. Shrinkage during cooking is inevitable and it occurs with every cooking method. It can be as low as 10%, or as high as 50%, but average shrinkage loss is between 15% and 30%.
Get the most out of beef and lamb when cooking by:
Keep cooking temperatures low - Some cooking loss is unavoidable, but using low cooking temperatures keeps it to a minimum. There is less meat shrinkage at low temperatures. Tests show that even when two beef roasts are cooked to the same degree of doneness, roasting losses are usually less at a lower, constant temperature for a longer period of time, than at a higher temperature for shorter time.
Simmer, don't boil - Gentle simmering cooks meat evenly. Simmered meats have less cooking loss than boiled meats.
Grill, don't burn - Grilling requires high temperatures. If the temperature is too high it will burn the outside of the meat and dry, shrink and cook it unevenly.
Don't cook meats longer than necessary - (But ensure internal temperature is high enough to kill bacteria). The longer a roast is in the oven, the more it shrinks so do not overcook. The larger the cut, the longer the cooking time needed, but keep in mind that a thin, flat roast might take half the cooking time of a thicker roast of the same weight. Always take into account the shape as well as the cut and weight of the meat when calculating cooking time.
Note the cooking load - Remember that the cooking load affects cooking time. Three roasts placed together in the conventional oven will take longer to cook than one roast because heat is dissipated into the greater mass of meat.
Carve it right to cut losses - Good carving techniques help to minimise meat losses during slicing. Carve meat across the grain for optimum tenderness.
Trimmings - Put them to good use
Fat (dripping) render - Use for cooking
Bones and sinews - Use in stock making, for sauces, soups etc
Large trimmings - Dice or cut into strips for casseroles, kebabs and stir-fries
Small trimmings - Mince for use in pies, patties, meat loaves