how long does it take to defrost a 4 pound roast
1 To thaw beef in cold water, do not remove packaging. 2  Be sure the package is airtight or put it into a leakproof bag. 3  Submerge the beef in cold water, changing the water every 30 minutes so that it continues to thaw. 4  Small packages of beef may thaw in an hour or less; a 3- to 4-pound roast may take 2 to 3 hours. Be sure the package is airtight or put it into a leakproof bag. 2  Submerge the beef in cold water, changing the water every 30 minutes so that it continues to thaw. 3  Small packages of beef may thaw in an hour or less; a 3- to 4-pound roast may take 2 to 3 hours.