Can You Put Tin Foil in a Slow Cooker? Safe Uses, Lids and Chicken
Yes, you can put tin foil (aluminum foil) inside a slow cooker. It is safe for wrapping potatoes, making a sling to lift meatloaf, or lining the pot. Keep the foil inside the crock and away from the heating base.
Do not wrap foil around the outside of the cooker. A crimped sheet of foil can stand in for a lost lid in a pinch, but a proper lid works better, because slow cookers depend on a tight lid to hold heat.
- Foil is safe in contact with food in a slow cooker. The USDA says pitting or blue marks from salty or acidic food are a harmless aluminum salt.
- Use foil for slings, potato wraps, separating foods and collars against hot spots.
- Never cover vents or wrap foil around the outside or the heating base.
- Crock-Pot says to keep the lid on and not lift it in the first two hours. Foil leaks more heat than a fitted lid.
- Wrapped food cooks a little more slowly. Check meat with a thermometer.
Is it safe to put tin foil in a slow cooker?
Yes, inside the crock. What most people call tin foil is aluminum foil, and it can handle the 170 to 280°F that a slow cooker reaches. It will not melt or catch fire at those temperatures.
Foil can react with salty, vinegary, very acidic or very spicy food, leaving tiny holes or a bluish film. The USDA says this is a harmless aluminum salt that presents no safety problem, though you can trim it off for appearance.
If you would rather avoid that, put parchment paper between acidic food, such as tomato sauce or vinegar-based barbecue sauce, and the foil.
Good ways to use foil in a slow cooker
| Use | How | Why it helps |
|---|---|---|
| Sling | Fold two long strips of foil and cross them under the food, ends up the sides | Lifts out meatloaf, cheesecake or lasagna in one piece |
| Potato wraps | Wrap scrubbed potatoes individually | Keeps them dry for “baked” style potatoes |
| Food packets | Wrap vegetables or a side separately on top of a roast | Cooks two things at once without mixing flavors |
| Collar | Line the hottest side of the crock with a folded strip | Reduces scorching on cookers with a hot spot |
| Liner | Line the crock for sticky dishes | Easier cleanup; slow cooker liners are an alternative |
| Tent for serving | Lay loosely over food on the Warm setting | Reduces drying when serving from the cooker |
Can you use foil as a slow cooker lid?
Only as a short-term fix. A slow cooker cooks gently and relies on trapping heat and moisture under the lid. Crock-Pot advises keeping the lid on for the recommended time and not removing it in the first two hours unless the recipe says so.
If your lid is broken or lost, use two layers of heavy-duty foil, press them tightly around the rim, and add a heavy plate on top if it does not fit snugly. Expect longer cooking times, and check meat with a thermometer.
The lid does not fit over a ham or roast
This is the most common reason people reach for foil. Tent heavy-duty foil over the food and crimp it firmly around the rim of the crock so steam cannot escape. Turn a large ham once or twice, and baste it so the exposed top does not dry out.
If the meat sits more than an inch above the rim, trim it to fit or use a larger slow cooker. Our guide to crock pot sizes shows what fits in each size.
Can you wrap chicken legs in foil in a slow cooker?
Yes. Wrapping chicken legs separately keeps them out of the sauce and can stop them falling apart. Foil packets cook a little more slowly, so allow extra time.
- Thaw the chicken first. The USDA advises against putting frozen meat in a slow cooker.
- Season the legs, wrap each one loosely, and lay the packets in a single layer if possible.
- Add about ½ cup of water or broth to the bottom of the crock to create steam.
- Cook on low for about 6 to 7 hours or high for 3 to 4 hours, then check that the thickest part reaches 165°F.
A whole chicken can also be wrapped, or set on balls of crumpled foil to lift it out of the juices. Use a thermometer in the thigh to confirm 165°F.
Can you bake in a foil pan inside a slow cooker?
Yes, if it fits with a little space around it. A foil pan or loaf tin set inside the crock works for cakes, bread pudding and meatloaf.
Put about ½ inch of hot water in the crock around the pan, and lay a folded paper towel under the lid to catch condensation.
Where not to use foil
Do not wrap foil around the outside of the slow cooker or tuck it between the crock and the heating base. It can trap heat in the housing, cover vents and damage the appliance. Foil should only go inside the stoneware crock.
- Not in the microwave. Crock-Pot says its crocks can go in the microwave without the lid. Take any foil out first.
- Not touching the heating element. Keep foil inside the crock at all times.
Alternatives to foil
- Slow cooker liners: heat-resistant bags that line the crock for easy cleanup. Crock-Pot says to follow the package directions and remove the food before lifting out the liner.
- Parchment paper: a non-reactive layer for acidic foods and for lining under cakes.
- A replacement lid: most brands sell replacement glass lids by model number.
- Oven-safe dish: small baking dishes can sit inside a large crock instead of foil pans.
Frequently asked questions
Can you put tin foil in a crock pot?
Yes, inside the stoneware crock. Use it for slings, liners, potato wraps and food packets. Do not put foil around the outside or near the heating base.
Can you line a crock pot with tin foil?
Yes. Press the foil smoothly against the crock so it does not trap pockets of food. For very acidic food, add parchment between the food and the foil, or use a slow cooker liner.
Can I use foil instead of the slow cooker lid?
In a pinch. Use two layers of heavy-duty foil crimped tightly around the rim. It holds heat less well than a lid, so cooking takes longer. Replace the lid as soon as you can.
Does putting foil on the outside of a slow cooker help?
No. It can trap heat in the housing and cover vents. Insulation belongs inside the crock, under a tight lid, not wrapped around the appliance.
Is it safe if foil touches tomato sauce in a slow cooker?
Yes. The USDA says pinholes or a blue film from acidic or salty food on foil are a harmless aluminum salt. You can trim it off or use parchment as a barrier.
The bottom line
Foil is safe inside a slow cooker and useful for slings, wraps and packets. Keep it inside the crock, never wrapped around the outside, and only use it as a temporary lid.
For more slow cooker basics, see whether you can put a slow cooker pot in the oven and how to slow cook sirloin steak.
- USDA Food Safety and Inspection Service, Meat and Poultry Packaging Materials (aluminum foil).
- USDA Food Safety and Inspection Service, Slow Cookers and Food Safety.
- Crock-Pot, Slow Cooker Cooking Tips, General Information and Slow Cooker Liners FAQs.
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