Quote:
Originally Posted by purgatory.sv
Delta t, is this a reference to changing the temperature as in lower and cooking a little longer?
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Delta means difference. In this case the difference between the oven temperature and the internal temperature of the roast. Let's say the roast just came from the fridge and is at 40F. You take that 40F roast and put it in a 350F oven. The difference at that point is 350F -40F = 310F difference
Because of the nature of connective tissue and protein- the greater the difference-the quicker the protein coagulates(firms and shrinks) the more moisture will be driven from the cell.
In Delta T cooking you set the delta(difference) I prefer about 10F.
If the roast is at 40F then the oven is 10F hotter.
As the roast warms to lets say 100F the oven is at 110F -always just 10F hotter than the core temp of the product. And then at about 10F from your desired finished temperature the oven would cycle on and off until the oven temp and finished core temp are the same.
What does this really mean?
Cooked in a conventional oven 100 lbs of roast would yield about 75lbs of finished product.
With Delta T- 100 lbs of roast would yield about 90lb of finished product.
A convection oven would be lucky to yield 65 lbs of product