You have a brisket waiting for the smoker, but when you open the refrigerator or freezer, the center still feels like a slab of ice. That can throw off an entire barbecue schedule. A whole packer brisket is thick, heavy, and often weighs well over 10 pounds, so it needs far more thaw time than a steak or a pound of ground beef.
If you want to know how long to thaw brisket, a good refrigerator estimate is about 24 hours for every 5 pounds, with extra time for very thick cuts. A 10-pound brisket may need around 2 days, while a 15-pound whole packer can need about 3 days or a little longer. Cold-water thawing is faster and can take roughly 30 minutes per pound, though a thick brisket may need extra time near the center.
Brisket Thawing Time by Weight
Brisket size makes the biggest difference. A small flat can thaw within a day, while a large whole packer may need most of the workweek in the refrigerator.
| Brisket Weight | Refrigerator Thaw Time | Cold-Water Estimate |
|---|---|---|
| 3 lb | About 24 hours | About 1 1/2 hours |
| 5 lb | About 24 hours | About 2 1/2 hours |
| 7 lb | About 1 1/2 to 2 days | About 3 1/2 hours |
| 10 lb | About 2 days | About 5 hours |
| 12 lb | About 2 1/2 to 3 days | About 6 hours |
| 15 lb | About 3 days or longer | About 7 1/2 hours |
| 18 lb | About 3 1/2 to 4 days | About 9 hours |
| 20 lb | About 4 days or longer | About 10 hours |
Treat these numbers as working estimates rather than an exact alarm clock. A 15-pound brisket shaped like a thick brick may need longer than a flatter 15-pound cut. Refrigerator temperature matters too. Meat thaws more slowly in a refrigerator set close to 35°F than in one kept closer to 40°F.
How Long to Thaw Brisket in the Refrigerator
For refrigerator thawing, plan on roughly one day for every five pounds of brisket.
Put the frozen brisket on a rimmed baking sheet, roasting pan, or other dish that can catch liquid. Keep the meat wrapped while it thaws.
Place it on a lower refrigerator shelf and keep the refrigerator at 40°F or colder.
A five-pound brisket flat may need about one day. A 10-pound brisket can need around two days. A large 15- to 20-pound packer can need three to four days or longer.
Starting early is rarely a problem. Raw beef roasts that thaw in the refrigerator can generally remain refrigerated for another three to five days before cooking.
How Long to Thaw a 5 Pound Brisket
A five-pound brisket flat will commonly need about 24 hours in the refrigerator.
If you want to cook it Saturday morning, moving it from freezer to refrigerator Thursday night or Friday morning gives you a comfortable window.
For cold-water thawing, a five-pound brisket may need around 2 1/2 hours.
Keep the package watertight and replace the cold water every 30 minutes.
How Long to Thaw a 10 Pound Brisket
A 10-pound brisket will commonly need around 2 days in the refrigerator.
If it is going onto the smoker Saturday morning, move it into the refrigerator by Thursday morning. Wednesday night gives you even more room.
A cold-water thaw may take roughly 5 hours.
Check the thickest part before seasoning. The flat can feel fully flexible while a frozen patch remains deep inside the point.
How Long to Thaw a 12 Pound Brisket
A 12-pound brisket can need about 2 1/2 to 3 days in the refrigerator.
For a Saturday cook, Wednesday is a good day to move it from freezer to fridge.
Cold-water thawing can take around 6 hours.
If the brisket is vacuum sealed, inspect the package before putting it in water. Any tear or loose seal means the brisket should go into another leak-proof food bag.
How Long to Thaw a 15 Pound Brisket
A 15-pound whole packer commonly needs about 3 days, and a particularly thick brisket may need longer.
If smoking starts early Saturday morning, moving the brisket into the refrigerator Tuesday night or Wednesday morning gives you a safer schedule than waiting until Thursday.
Cold-water thawing may take roughly 7 1/2 hours.
A whole packer has a thick point sitting over part of the flat, so check that heavy end carefully.
How Long to Thaw an 18 Pound Brisket
An 18-pound brisket may need around 3 1/2 to 4 days in the refrigerator.
That sounds like a long time, but a large packer contains a great deal of frozen beef packed into a thick form.
For a weekend barbecue, moving it into the refrigerator around Tuesday is sensible.
A cold-water thaw can take around 9 hours, which is a long hands-on thaw because the water needs to be replaced every half hour.
How Long to Thaw a 20 Pound Brisket
A 20-pound brisket can take 4 days or longer in the refrigerator.
If the brisket needs to go onto the smoker Saturday morning, Monday night or Tuesday morning is a comfortable starting point.
Cold-water thawing can take around 10 hours.
For a brisket this large, refrigerator thawing is far easier than spending an entire day tending a cold-water bath.
How to Thaw Brisket Fast in Cold Water
Cold water is useful when the brisket needs to be ready today rather than several days from now.
Keep the brisket inside a leak-proof package. Vacuum-sealed meat works well when the seal is intact.
Submerge the package in cold tap water.
Replace the water every 30 minutes.
A working estimate is around 30 minutes per pound. A seven-pound flat may need about three and a half hours, while a 12-pound brisket can need roughly six hours.
Very thick briskets may take longer. Check the point and thick center before deciding the thaw is finished.
Cook brisket after cold-water thawing rather than putting it back into the refrigerator for another day.
Can You Thaw Brisket in Warm Water?
Use cold water instead.
A brisket is thick enough that the center can remain frozen long after its surface begins warming.
Warm water speeds up the outer warming far more than it helps the deepest part of the brisket.
Cold tap water still shortens the thaw dramatically compared with refrigerator air.
Can You Thaw Brisket in Hot Water?
No. Hot water is not a good shortcut.
The surface can become warm while the point and center remain icy.
For a fast thaw, keep the brisket sealed and use cold water with fresh water every 30 minutes.
Can You Leave Brisket on the Counter to Thaw?
Do not thaw brisket on a kitchen counter.
The problem is its size. A 12- or 15-pound brisket can sit for hours with a frozen middle while its outer layer becomes much warmer.
A garage, porch, vehicle, basement, or outdoor table is not a good replacement for a refrigerator either.
Use refrigerator air or cold water instead.
How Can You Tell When Brisket Is Fully Thawed?
Check the thickest part, not only the flat.
A frozen brisket feels rigid. As it thaws, the meat bends more easily and gives under pressure.
The flat usually softens before the point because it is thinner.
Press around the thick point through the package. If you feel a hard knot that seems almost like a stone inside the meat, more thaw time is needed.
The brisket should still feel very cold when fully thawed. Cold beef and frozen beef feel different once you press the center.
What If My Brisket Is Still Frozen in the Middle?
If smoking or cooking is still several hours away, leave it in the refrigerator longer.
If time is short, finish the thaw in cold water while the brisket stays sealed.
Check it every 30 minutes.
A partly frozen center can take longer than expected to finish because the point is often several inches thick.
Do not rush that last frozen section with hot water.
Can You Smoke a Partially Frozen Brisket?
Thaw the brisket completely before putting it into a smoker.
Smoking uses lower cooking temperatures than a hot oven. A frozen center slows the rate at which the brisket warms and can make the cook harder to manage.
A fully thawed brisket is also easier to trim and season.
Salt and seasoning stick more evenly to thawed meat than to a surface covered with frost.
If the brisket is still frozen on smoking day, finish it with the cold-water method before starting the fire.
Can You Cook Brisket From Frozen?
Beef can be cooked from frozen in an oven, though cooking can take roughly 50 percent longer than with thawed meat.
For brisket, thawing first is usually much easier.
You may want to trim the fat cap, remove hard fat, season every side, apply a binder, or inject the meat. Those jobs are difficult when the brisket is frozen solid.
For barbecue smoking, begin with thawed meat.
Can You Put Frozen Brisket in a Slow Cooker?
Thaw brisket before using a slow cooker.
Slow cookers warm large pieces gradually, and a frozen brisket begins the cook at a much lower temperature than thawed beef.
Move it into the refrigerator several days ahead or finish the thaw with cold water before slow cooking.
How Long to Thaw a Brisket Flat
A brisket flat is smaller and thinner than a whole packer.
A three- to five-pound flat will often need about 24 hours in the refrigerator.
A six- or seven-pound flat may need one and a half to two days.
Cold-water thawing can take roughly 30 minutes per pound.
Because the flat has a more even thickness than a whole packer, it can thaw more predictably.
How Long to Thaw a Whole Packer Brisket
A whole packer contains both the flat and point muscles.
Most packers weigh somewhere around 10 to 18 pounds, though larger cuts are available.
Give a 10-pound packer about two days in the refrigerator. A 15-pound packer may need about three days. An 18-pound brisket can need closer to four.
The point is the section to watch. It can remain icy after the flat feels fully thawed.
How Long to Thaw Vacuum-Sealed Brisket
Vacuum sealing does not greatly change refrigerator thaw time, but it makes handling easier.
Leave the sealed brisket on a tray in the refrigerator.
For cold-water thawing, make sure the plastic has no pinholes or broken seams.
If the vacuum bag leaks, put it inside another leak-proof bag before placing it in water.
Should You Trim Brisket Frozen or Thawed?
Brisket is easier to trim when it is cold and firm, but not frozen solid.
A slightly chilled brisket makes the fat easier to cut because the fat stays firm under the knife.
Rock-hard frozen fat and meat are harder to trim safely.
Let the brisket thaw fully in the refrigerator, then trim it while it is still refrigerator-cold.
How Early Should You Thaw Brisket for a Saturday Smoke?
Work backward from the time you plan to put it on the smoker.
For a five-pound flat, Thursday night or Friday morning may be enough.
For a 10-pound packer, move it into the refrigerator by Thursday morning.
For a 15-pound brisket, Tuesday night or Wednesday morning gives you a better window.
For an 18- to 20-pound brisket, Monday night or Tuesday is easier.
Starting early gives you time to trim and season the brisket without staring at a frozen center late Friday night.
Can Thawed Brisket Stay in the Refrigerator?
Yes. A raw beef roast thawed in the refrigerator can generally remain there for another 3 to 5 days before cooking.
This gives you plenty of room to start thawing early.
Keep the brisket at 40°F or colder and leave it wrapped until trimming time.
If plans change, refrigerator-thawed beef can generally be frozen again, though it may lose a little moisture.
Can You Refreeze Thawed Brisket?
If the brisket thawed in the refrigerator and stayed cold, it can be frozen again without cooking.
The texture may lose a little quality because moisture can escape during another freeze and thaw.
Brisket thawed in cold water or the microwave should be cooked before another freeze.
How to Thaw Cooked Brisket
Cooked brisket can also be thawed in the refrigerator.
A large frozen chunk may need about 24 hours or longer, while individual sliced portions can thaw within several hours.
Keep the brisket covered so the slices do not dry out.
If there are cooking juices in the package, keep them with the meat. They can help keep brisket moist during reheating.
How to Thaw Frozen Smoked Brisket
Move smoked brisket from the freezer into the refrigerator the day before you plan to reheat it.
A small sliced package may thaw overnight. A large unsliced chunk can need a full day or longer.
Reheat cooked brisket to 165°F.
A covered pan with a little saved brisket juice, broth, or other cooking liquid can help keep the meat moist while it warms.
How Long Can Cooked Brisket Stay in the Refrigerator?
Cooked beef leftovers generally keep for about 3 to 4 days in the refrigerator.
Keep cooked brisket covered and cold.
If you will not eat it within that period, freeze it in smaller portions.
Sliced portions thaw much faster than a whole cooked brisket.
How to Freeze Brisket So It Thaws Faster Next Time
If you are freezing raw brisket, think about how you expect to cook it later.
A whole packer needs several days to thaw because of its size.
If you know you will only cook half at a time, separating the point and flat before freezing can shorten the later thaw.
For cooked brisket, divide the meat into meal-size portions before freezing.
Flat freezer bags containing sliced brisket can thaw much faster than one thick frozen block.
Common Mistakes When Thawing Brisket
One common mistake is assuming a 15-pound brisket will thaw overnight.
Another is checking only the thin flat while ignoring the thick point.
Hot-water thawing warms the outside too quickly.
Leaving brisket on the counter for most of the day creates the same problem.
Another mistake is waiting until Friday afternoon to thaw a huge brisket for an early Saturday smoke. Large packers need days, not hours, in a refrigerator.
The simple fix is to count backward from smoking day and give yourself an extra half day when the brisket is especially thick.
Frequently Asked Questions About How Long to Thaw Brisket
How long does a brisket take to thaw in the fridge?
A useful estimate is about 24 hours for every five pounds. A 10-pound brisket may take two days, while a 15-pound brisket may need around three days or longer.
How long does a 10 lb brisket take to thaw?
Plan on about two days in the refrigerator or around five hours in cold water.
How long does a 15 lb brisket take to thaw?
Allow about three days in the refrigerator. A thick whole packer may need additional time.
Can I thaw brisket overnight?
A small brisket flat may thaw overnight, but a large whole brisket needs much longer.
How quickly can you thaw a brisket?
Cold-water thawing is the quicker method. Keep the brisket in a leak-proof package, use cold tap water, replace the water every 30 minutes, and figure on roughly 30 minutes per pound.
Can you leave frozen brisket out overnight?
No. Use the refrigerator or cold-water method instead.
Can I smoke brisket if it is still frozen?
Thaw it completely before smoking. A thawed brisket trims, seasons, and cooks more predictably.
How many days before smoking should I thaw brisket?
About two days for a 10-pound brisket, three days for a 15-pound brisket, and as much as four days for a very large 18- to 20-pound packer.
Can I thaw brisket early?
Yes. Raw beef roasts thawed in the refrigerator can generally remain chilled for another three to five days before cooking.
What part of brisket thaws last?
The thick point is commonly the last section to lose its frozen center. Check it even when the flat already bends easily.
The Easy Way to Time a Frozen Brisket
For refrigerator thawing, remember the simple starting estimate of about 24 hours for every five pounds.
A five-pound flat may need one day. A 10-pound brisket may need two. A 15-pound packer can need around three, while an especially large 20-pound brisket can need four days or more.
If the brisket is still frozen when cooking day arrives, use cold water. Keep the package sealed, replace the water every 30 minutes, and figure on roughly 30 minutes for each pound.
For smoking, give the brisket enough time to thaw completely. The thick point is usually the stubborn spot, so check it before trimming and seasoning.
A big brisket moves on its own slow clock. Start several days ahead and the freezer stops controlling barbecue day. By the time the smoker is ready, the brisket can be trimmed, seasoned, cold, flexible, and ready for a long cook instead of hiding a chunk of ice in its center.