The best and safest way to thaw a frozen turkey roll roast is to move it from the freezer into the refrigerator to allow it to thaw. In a time crunch, you can remove it from the box and soak in cold water to thaw. You should change the water every 30 minutes or so until it is completely thawed.
The quickest and safest way to thaw a frozen turkey is to place it in a sink or large container filled with cold water. Change the water every 30 minutes to ensure it stays cold. This method can thaw a turkey in about 30 minutes per pound.
How long does it take in the refrigerator to thaw a 21lb. frozen whole turkey?
The best way to thaw a frozen turkey before cooking it is to place it in the refrigerator and allow it to thaw slowly over several days. Make sure to place the turkey on a tray to catch any drips and allow for proper air circulation.
It is strongly recommended that you thaw a turkey (or any frozen meat product) in the refrigerator so that the turkey does not warm up enough for any bacteria that may be on it to reactivate and start multiplying.
A frozen 20 pound turkey will take about three days to thaw in the fridge.
To safely thaw a frozen turkey before cooking, you can either thaw it in the refrigerator, in cold water, or in the microwave. Thawing in the refrigerator is the safest method as it keeps the turkey at a safe temperature. Place the turkey in a pan to catch any drips and allow 24 hours of thawing time for every 4-5 pounds of turkey. Make sure to cook the turkey immediately after it is fully thawed.
You should put it in your refrigerator a week before to thaw. Never cook a frozen turkey, it can cause buring and an awful taste.
The best way to thaw it is in the refrigerator. Figure one day for each 4-5 pounds of turkey, so it should take 5-6 days to thaw out a 25-pound turkey.
The best time to buy a frozen turkey for Thanksgiving is about 1-2 weeks before the holiday. This allows enough time for the turkey to thaw properly in the refrigerator before cooking.
If it was frozen, then thaw it out, then heat it up (making sure it is cooked through. If it was not frozen, then I'm not sure so be careful.
The following link has information pertaining to your question: http://southernfood.about.com/library/info/bltrkeyb.htm Seven days in the refridgerator. A 20 pound frozen turkey if placed in the fridge will take three days to thaw.
How long it takes to thaw a Boston butt roast depends entirely on how big the roast is.