What to Do With Leftover Grease and Oil After Cooking (2024)

Deep fried foods can become addictive. There’s just something about the crispiness of deep-fried French fries and the creamy, fluffy texture of fried donuts. We won’t even start on fried chicken! But along with the risk to your waistline, there’s always the ultimate dilemma: what to do with leftover grease and oil?

You don’t ever want to flush it down the sink or toilet. Grease can build up and accumulate other debris, and the next thing you know, you have the King Kong of drain clogs. If your home has a septic tank, it’s even more critical that you avoid flushing down excess waste.

Luckily, there are a few alternative ways to use up your old grease and oil.

Reuse Grease

There’s a reason you hear old wives’ tales about saving bacon grease. Many experienced home cooks swear by rendered bacon grease to flavor foods. Not too long ago, every kitchen had a pot on the back of the stove for saving grease.

You can use bacon grease, lard, or even beef tallow as the fat for flakey pie crusts. Some swear by bacon grease for biscuits. Add a teaspoon or two to flavor cooked vegetables, like green beans.

To save grease for cooking, allow the pan to cool, but don’t wait so long that it congeals. Strain the grease into a wide mouth jar and store it in the refrigerator.

Well-strained, your bacon grease will last up to a year in the refrigerator. You can also freeze it if you want to save it longer.

Reuse Frying Oil

Professional cooks save deep-frying oil for future use all the time. After all, deep frying uses a several cups of it. If you’re using an expensive brand or formula, it feels tragic to throw it away after cooking one meal.

Simply strain it through a paper coffee filter and refrigerate to prevent spoiling until you can reuse it.

Another method from America’s Test Kitchens utilizes a mixture of cornstarch and water to collect all the particles from the used oil. It takes time, but it produces a very clean oil you’ll feel confident reusing in your cooking.

Be cautious about how many times you reuse the oil, as it degrades with subsequent heating. Most experts recommend three to four times for cooking meats and fish and up to 6 to 8 for vegetables and pastries. But don’t be afraid to finally dispose of it if it smells bad before then.

You don’t have just use it for deep frying, either. If kept in the refrigerator, you can reuse the oil in place of fresh in any recipe. Use it for frying eggs (unless you also saved some bacon grease) or any time you stir-fry.

Recycling Oil

More communities are finding ways to reduce, reuse, and recycle items we used to just throw away. Cooking oil recycling collection points are popping up all across the country. St. Lucie County has joined the program, and you can drop off used cooking oil at the county solid waste center.

Many companies convert used cooking oil to biofuels. Others process it into animal feed. It also takes the place of petroleum products in paint, cleaners, and plastics.

Recycling Grease

One way to recycle grease is to use it to feed wildlife. During cold spells, you can make a suet ball from leftover grease for wild birds. While South Florida doesn’t normally have cold winters, we experienced a few freezes last year that certainly made our population of migrant birds wonder if they’d arrived at the right place.

  1. Collect leftover animal fats from cooking until you have one or two cups.

  2. Gently melt the fats and strain several times to remove any meat particles.

  3. Mix in ingredients like grains, seeds, dried fruits, birdseed, or even breadcrumbs.

  4. Find something to mold your bird food, such as an empty tin can or muffin tins.

  5. Place the filled mold in the freezer for 2 hours and then remove.

  6. Tie your now-solid suet ball to a tree using ribbon or even hang it in a net onion bag.

Disposing of Leftover Grease and Oil

If you must throw away old grease and oil, make sure you do it correctly.

Dispose of used cooking oil by waiting until it’s cool and pouring it into a sealable container. Make sure the lid is tight before tossing.

For used greased, let the fat cool and become solid first. Then, scrape it into any sealable container you’re also throwing away. Coffee cans or those non-metal cans used for snacks and mixed nuts will work fine.

Don’t pour it down your sink or toilet!

However, if you do, make an appointment with the plumbing pros at Benjamin Franklin Plumbing in Port St. Lucie. We’ll remove that greasy clog for you.

What to Do With Leftover Grease and Oil After Cooking (2024)

FAQs

What to Do With Leftover Grease and Oil After Cooking? ›

Cooled, solidified oil can be thrown in the trash once it is placed into a sealed container. You can use glass jars, waxy containers like milk cartons, and styrofoam boxes to contain any potential leaks. A rather easy way to accomplish this is by lining a bowl with parchment paper before pouring in used grease.

What can I do with leftover grease and oil? ›

Toss Leftover Grease in the Trash

To avoid pouring hot grease directly into your garbage can, follow these steps: Let the grease cool slightly in the pan. Scrape the grease into an old jar, can, or bottle. Seal the container or place it in a zip-top bag, and toss it in the trash.

What can I do with leftover oil and fat? ›

Any leftover cooking fat in a roasting tray, for example, should be emptied into a container such as a fat trap or an old margarine tub. Here fats and grease can be collected and allowed to sit, cool and solidify. At this point the contents can be disposed of in the bin.

What do you do with leftover oil after deep frying? ›

If you don't have recycling options near you, you could try calling your local fire department to see if used oil is accepted. If you're out of luck, don't throw used oil down the drain or toilet as it will cause all kinds of issues. Instead, seal your cooking oil container and dispose of it in the garbage.

Can you pour grease in the yard? ›

The rationale is that it should just filter away through the ground but this isn't the case. Oil and grease will filter down, but this will in time become harmful for sewage and plumbing systems, potentially affecting your whole neighborhood. Avoid throwing your used cooking oil anywhere outside but the trash.

What can I do with heavy oil residue? ›

The most straightforward way to get rid of Heavy Oil Residue is to convert it to Petroleum co*ke in a Refinery, allowing it to be automatically sunk in an AWESOME Sink or burned for power in a Coal Generator.

Can I reuse frying oil that sat out overnight? ›

You can use leftover oil for your next batch of fries, but be on the lookout for signs of spoilage. Spent frying oil has an acrid aroma; if you smell even a hint of rancidity or anything off, err on the side of caution and spring for fresh oil. If your recycled oil looks cloudy or foamy, it's time to toss it.

Can I reuse oil after frying bacon? ›

Even after straining and cleaning, you should only reuse frying oil a limited number of times. If you're frying meats, you can reuse it up to three or four times. For vegetables or dough, you can reuse it as many as six or eight times.

Can you pour cooking oil in the garden? ›

No. You should never throw used frying oil outside. It may seem harmless, but the grease will still eventually end up in the sewer system and cause clogs and other issues. Dumping your used cooking oil into the ground is bad for the environment and is also detrimental to surrounding wildlife.

What can I do with large amounts of used cooking oil? ›

Contact a household hazardous waste disposal company.

Companies that collect household hazardous waste (HHW) often collect used cooking oil.

What can I use cooking fat for? ›

Add bold flavor to salads, dressings & marinades or use as a finishing oil for just about anything! Suitable for baking, oven cooking, stir-frying, light sauteing & sauces. Great for grilling, sauteing, roasting, frying, and baking.

How to dispose of leftover frying oil? ›

Answer: Cooking oil and grease should be disposed in regular trash container. To do so, you may pour the oil into a sealable container such as an empty coffee can, then place the container in your regular household trash. Pouring grease down the drain can potentially clog your drain.

How many times can you reuse oil after frying? ›

Frying oil can be reused anywhere from two times to up to eight times — it all depends on the type of oil, what you're frying in it, how well you've strained it, and more. There's no hard and fast rule for when oil is no longer suitable for frying; instead, pay attention to your oil and detect any changes.

What can you do with oil and grease? ›

Answer: Cooking oil and grease should be disposed in regular trash container. To do so, you may pour the oil into a sealable container such as an empty coffee can, then place the container in your regular household trash. Pouring grease down the drain can potentially clog your drain.

How long is leftover grease good for? ›

Where To Store Bacon Grease. Although many of us grew up with relatives who stored their bacon grease in a jar or can set on the counter or on the back of the stovetop, food safety experts don't recommend storing it that way now. Instead, store bacon grease in the refrigerator (up to 3 months) or freezer (indefinitely) ...

What grease can be repurposed or recycled? ›

“yellow” grease and can be recycled into animal feed, lubricants, and fuels such as biodiesel. Small quantities of oil that cannot be recycled should be solidified with absorbent materials, placing the used materials in a separate sealed bag before throwing away.

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