Cheese is technically compostable, but it comes with real drawbacks that make it risky for most home composters
Cheese will eventually break down in a compost pile—bacteria and fungi will decompose it. The problem is that it attracts rats, raccoons, and other animals to your bin, and it can create odor problems while it decomposes. Hard, aged cheeses like Parmesan break down slowly over months. Soft cheeses like ricotta or cream cheese break down faster but smell worse during the process. If you have a sealed, hot compost system or a commercial composting program nearby, cheese is manageable. If you have an open backyard pile, it's usually not worth the trouble.
The decision comes down to what kind of system you have and whether you're willing to manage the risks. A sealed tumbler or hot pile can handle small amounts of cheese. An open pile almost certainly cannot, especially if you live in an area with raccoons or rats nearby.
Key Takeaways
- Cheese will decompose in a compost pile, but soft varieties attract more pests and odor than hard ones.
- Open backyard compost piles are vulnerable to rats and raccoons when cheese is added, especially in urban or suburban areas.
- Sealed bins, hot compost systems, and commercial composting programs can handle cheese more safely than open piles.
- Burying cheese deep in the center of a hot pile reduces pest attraction, but requires the pile to reach 140°F or higher consistently.
- If you're unsure whether your system can handle it, leaving cheese out of the compost is the simpler choice.
Why cheese attracts pests to your compost
Cheese is high in fat and protein, which makes it smell like food to animals. Rats and raccoons have excellent senses of smell and will dig into a compost pile specifically to find cheese, along with other dairy and meat scraps. Once an animal finds food in your pile, it will return repeatedly and may damage the bin itself trying to get in.
The problem is worse in urban and suburban areas where raccoons and rats are already present. Rural areas with fewer animals nearby have less risk, but it's still not zero. Even if you don't see animals during the day, they may visit at night and tear open bags or scatter your pile. A single discovery of cheese can turn your compost into a regular feeding station.
How different types of cheese break down
Hard, aged cheeses like Parmesan, cheddar, and Gruyère are denser and take longer to decompose—sometimes several months. They produce less smell during breakdown, which is one advantage. Soft cheeses like ricotta, cream cheese, and fresh mozzarella break down much faster, sometimes in weeks, but they create stronger odors as they decompose.
Processed cheese products (cheese slices, cheese powder) contain additives and stabilizers that slow decomposition. Moldy cheese breaks down faster than fresh cheese because the mold has already begun the decomposition process. In all cases, the fat content means cheese will not break down as quickly as vegetable scraps or leaves.
Composting cheese safely in a sealed or hot system
If you use a sealed compost bin or tumbler, cheese is much safer to add because animals cannot access it. Sealed systems also trap odors better than open piles. Bury the cheese in the center of the pile, surrounded by brown materials like shredded paper or leaves, to speed decomposition and reduce smell.
Hot compost systems—piles that reach and maintain 140°F or higher—can handle cheese more effectively than cold piles. The heat kills pathogens and speeds decomposition. If you actively manage your pile by turning it regularly and monitoring temperature, you can add small amounts of cheese without major problems. The key is "small amounts"—a handful of grated cheese is different from an entire block.
Commercial composting facilities are designed to handle cheese and other materials that home composters should avoid. If your area has a municipal composting program or a private facility that accepts food scraps, cheese can go there. Check your local program's website or call to confirm they accept dairy before you drop it off.
What happens if you add cheese to an open pile
An open backyard compost pile with cheese will likely attract animals within days, especially if you live near other houses or wooded areas. Raccoons will tear open bags and scatter material across your yard. Rats will burrow into the pile and may nest there. Once animals find food, they return repeatedly, and you may end up with a pest problem that extends beyond your compost pile.
The smell can also become a neighborhood issue. Decomposing cheese produces sulfur compounds and ammonia, which create a strong, unpleasant odor. If your pile is close to your house or your neighbors' houses, this becomes a real complaint risk. Covering the pile with a tarp helps a little, but it doesn't eliminate the smell or stop determined animals.
Safer alternatives to composting cheese
The simplest option is to throw cheese in the trash. It will end up in a landfill, but it won't create pest or odor problems at home. If you want to avoid the landfill, check whether your area has a commercial composting program. Many cities and towns now offer food-scrap collection, and these programs have the equipment and informed to handle cheese safely.
You can also feed small amounts of plain cheese to chickens or other livestock if you keep them, though this should not be their main food source. Cheese is high in fat and salt, so moderation matters. If you have none of these options, the trash is the responsible choice.
How to compost cheese if you decide to try
If you have a sealed bin or a hot compost system and want to add cheese, follow these steps. First, cut or grate the cheese into small pieces—smaller pieces decompose faster. Bury it in the center of the pile, at least 12 inches deep, surrounded by brown materials like shredded newspaper, cardboard, or dry leaves. This creates a barrier between the cheese and animals, and it helps the decomposition process.
Add the cheese gradually. One handful of grated cheese mixed into a large pile is fine. A whole block of cheese or repeated large additions will create problems. If you're using a hot pile, turn it regularly to keep the temperature up and speed decomposition. Monitor for smell and pests over the next few weeks. If you notice either, stop adding cheese and adjust your pile management.
Frequently Asked Questions
Will moldy cheese compost faster than fresh cheese?
Yes. Mold is already breaking down the cheese, so moldy cheese decomposes faster than fresh cheese. However, it still attracts pests and creates odor, so the same precautions explore. Mold itself is not a problem in compost—it's part of the decomposition process.
Can I compost cheese if I have a rat problem already?
No. If rats are already present in your area, adding cheese to any compost system—even a sealed one—increases the risk that they'll investigate your yard. Wait until the rat problem is solved, or use a commercial composting program instead.
What about butter or cream—can those be composted?
Butter and cream are pure fat and should not go in home compost piles. They decompose very slowly, attract pests, and create strong odors. Commercial composting programs may accept them, but home piles should not. Throw them in the trash.
Is it safe to compost cheese if I have a compost tumbler?
Yes, a sealed tumbler is one of the safest ways to compost cheese at home. Animals cannot access it, and you can control odor by burying the cheese in the center and turning the tumbler regularly. Start with small amounts to see how your system handles it.
How long does cheese take to fully decompose?
Hard cheese can take three to six months or longer in a cold pile. Soft cheese may break down in four to eight weeks in a warm pile. In a hot compost system maintained at 140°F or higher, soft cheese can decompose in two to four weeks. The exact time depends on pile temperature, moisture, and how finely you chop the cheese.