4 easy ways to safely dispose of cooking fat – these won't clog up drains or cause smells in your kitchen

Disposing of cooking fat safely is essential to avoid environmental harm, clogged pipes, and unpleasant odors. Improper disposal, such as pouring fat down the drain, can lead to severe plumbing issues and contribute to costly repairs.

From pouring into containers before putting into the trash, to making natural compost, our cleaning experts reveal their four favorite eco-friendly and effective ways to get rid of cooking fat responsibly.

So whether you're using the best air fryers or cooking on your stove top, here’s how you can safely get rid of used cooking fat without harming the environment or your plumbing.

1. Pour into a container

One of the simplest ways to dispose of cooking fat is by pouring it into a container, letting it set, and discarding it in the trash.

Vanessa Bossart, owner of GreenTerra Cleaning Service, says, 'This method is simple, cost-effective, and reduces the risk of clogging your plumbing. Simply let the fat cool slightly until it’s safe to handle but still pourable, then transfer it into a heat-resistant container. Once the fat solidifies, seal the container or carton and dispose of it in your regular trash.'

Bossart recommends using milk or half-and-half cartons as a convenient way to re-purpose these items for useful fat disposal, adding, 'Just remember to let it cool enough first. Never pour hot grease directly into a plastic container, as it may melt or leak.'

Other handy containers you may already have in the kitchen include aluminum foil you can shape into a vessel. It's also a surprising way to use Ziploc bags.

Steven Ip, founder of Cleanzen Boston Cleaning Services, says, 'One easy way to dispose of cooking fat is by using aluminum foil. Line a small bowl with a piece of foil, then pour the warm (but not hot) grease into it. Let the grease cool and solidify, then fold the foil tightly around it and throw it in the trash. This method is mess-free and keeps grease from clogging your pipes.

'I also like using a sturdy Ziploc bag [available at Amazon] to contain cooking fat. Once the grease has cooled a bit, pour it into a sealable bag and close it tightly. You can also wipe the pan with a paper towel and add that to the bag to prevent lingering odors. Then, simply throw the sealed bag in the trash.'

Ip recommends Reynolds Wrap Aluminum Foil from Amazon, and Ziploc Gallon Food Storage Bags, also from Amazon, adding, 'These food storage bags are great. Whereas some thin or perforated bags (like bread bags) can leak, these have a reliable, tight seal.'

There are also other useful ways to use aluminum foil around the house such as keeping pests out and sharpening scissors.

2. Solidify and scrape

For a more structured method, allow the cooking fat to go hard in the pan.

Ip says, 'Allow it to solidify, before scraping and disposing. If you don't want cooling grease sitting around for too long, mix a bit of flour into it while it’s still warm to help solidify it.'

Once solidified, scrape the fat into a sturdy trash bag or lined container using a spatula such as the OXO Nylon Flexible Turner Black Cooking Spatula from Target. Ensure the bag or container is tightly sealed before disposal to minimize odors and potential leaks.

You can also use a commercial product like FryAway Cooking Oil Solidifier.

3. Recycle or reuse

Cooking fat can often be recycled into biodiesel or other industrial products.

Bossart says, 'Many recycling programs convert used cooking fat into biodiesel, an eco-friendly fuel alternative. This method is sustainable and keeps fat out of landfills. First, check with your local recycling center or waste management service to see if they accept used cooking fat, then store the grease in a sealed, labeled container until you have enough to drop off.'

Container options include OXO Good Grips Airtight Containers from Amazon or Ball Glass Mason Jars from Walmart.

Bossart also encourages re-using cooking fat in the kitchen. She says, 'Another environmentally friendly and cost-effective option is to reuse fat in later cooking, reducing waste while enhancing the flavor of future meals. Simply strain the fat through a fine mesh strainer to remove any food particles, store the filtered fat in an airtight container in the fridge or freezer, then use it again when next frying or roasting.'

Cooking fat, especially oils, can be re-used for frying or sautéing. Cool the fat slightly, strain it through a sieve or cheesecloth to remove food particles, and store it in a clean, sealed container in the refrigerator. Re-use within a week and discard if the fat becomes dark, has an off smell, or shows visible impurities. Re-using fat conserves resources and reduces waste.

The Cuisipro Fat Separator from Amazon is a great tool for keeping and storing fat safely and easily. Perhaps best of all is how easy it is to clean – it's even dishwasher-safe.

Recycling cooking fat not only prevents waste but also contributes to eco-friendly energy solutions. For more tips, check out these things no one tells you about recycling at home.

4. Compost

Small amounts of plant-based cooking oils can be composted if free of contaminants.

Mix the oil with dry compost materials like sawdust, shredded newspaper, or even paper towels to prevent excessive moisture buildup in your compost pile. Paper towels – such as these Bounty Paper Towels from Walmart – are a safe addition when used sparingly.

Avoid composting animal fats, as they can attract pests and create unpleasant odors. Composting plant-based oils in small quantities enhances soil health while keeping waste out of landfills.

FAQs

Should I pour fat down the drain?

No. Pouring fat down the drain can lead to clogs as it cools and solidifies within the pipes, often forming large blockages known as 'fatbergs'. These can cause costly plumbing repairs and contribute to sewer overflows that harm the environment. Even small amounts of fat, when combined with other debris, exacerbate the problem. Instead, use safe disposal methods like solidifying and sealing fat before discarding in the trash.

Can I mix different fats for disposal?

Yes, you can mix fats like oil and grease for trash disposal, but keep them separate if recycling. Recycling centers may have specific requirements for the types of fats accepted. Always let fats cool, then place them in a sealed, sturdy container to avoid spills and odors. For easier handling, consider using a solidifier before discarding.

What's the best way to store fat until disposal?

Store cooking fat in a heatproof container, such as a glass jar or metal tin, allowing it to cool slightly before pouring. Refrigerating the container prevents odors and solidifies the fat for easier disposal. Always ensure the container is tightly sealed to avoid messes and potential pest issues. For larger amounts, consider multiple smaller containers for easier handling.

So there you have it – four ways to safely dispose of cooking fat. Properly disposing of cooking fat is essential for maintaining your home’s plumbing and protecting the environment. Whether you choose to solidify, recycle, compost or reuse your cooking fat, these methods offer practical, safe solutions for a cleaner home and planet.

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