13 Unexpected Uses for Coffee You Probably Didn't Know

You’ve heard coffee wakes you up—but did you know it can also fix scratches on your wooden furniture, make your car smell better, or even help your garden plants grow? If you’ve ever wondered whether your daily brew has other practical uses beyond drinking, the answer is yes—and then some.

The short answer? There are at least 13 documented, unusual ways to use coffee outside the cup, from pain relief to gardening, cleaning, and cooking. Each one is backed by a specific method, ingredient ratio, or observed effect described in the original research or trial.

1. Coffee for Headaches and Pain Relief

Clinical trials in Illinois found caffeine—known to slow blood flow—can reduce headache frequency and intensity. In one test group that drank only coffee, 58% reported complete relief. When combined with ibuprofen, 70% saw symptoms disappear. For migraines, drinking coffee at the first sign works best, as effects kick in 10–30 minutes after consumption.

2. Coffee in the Garden: Fertilizer and Soil Booster

Used coffee grounds add more than acidity—they provide nitrogen, phosphorus, ammonia, and trace minerals. Don’t bury them too deep: dig a hole about three-quarters down toward the plant roots and add grounds monthly. Avoid overuse with acid-loving plants, as too much can overly acidify the soil. This method supports plants like roses, rhododendrons, and evergreens without promoting mould, as long as grounds are placed properly in soil.

3. Coffee for Cleaning and Odor Removal

Fresh coffee beans can deodorize your car by absorbing heavy food smells. Just place them in a small, open container inside the vehicle. Similarly, heating about a cup of coffee beans in an iron skillet at a low temperature can neutralize pet odors in a room. Place the skillet on a stand and move it to the smell-heavy area; let the beans cool for best results.

4. Coffee as a DIY Tool and Craft Aid

Coffee can multitask in creative ways. Mix 2–3 tablespoons of instant coffee with just enough water to form a thick paste, optionally adding iodine to match wood tone, and use it to fill cracks in dark wooden furniture. Smooth it on with a putty knife or plastic tool, wipe excess, and let dry. Additionally, an empty coffee can, cleaned and sprayed out, can serve as a makeshift mini oven to bake bread. Just ensure it’s free of coffee residue and lined or sprayed appropriately.

5. Coffee in Cooking and Food Prep

Add coffee or tea to compost or fertilizer to speed up bacterial activity and decomposition. For a beauty hack, gently rub wet coffee grounds on your skin to exfoliate dead cells—rinse afterward. When boiling an egg, using a quarter-strength concentrated coffee brew can dye it a light brown color. And if you’re cooking meat, adding black coffee while braising lamb chops enhances both colour and flavour. The same goes for beef or pork when applied directly to the meat surface.

6. Coffee for Hair, Wiring, and Outdoor Use

Pouring strong, freshly brewed coffee onto clean, dry hair and leaving it for 20 minutes can add shine—repeat weekly for best results. For holiday lights, use an empty coffee can and its lid to neatly wind and organize tangled cords; cut a hole in the plastic lid, thread the wire through, and wrap the cord around the can, securing the end and filling leftover space with other balls of wire.

7. Brewing Without a Machine: Coffee Can Bread

No oven? No problem. A cleaned and sprayed coffee can be used to bake bread. Punch small holes in the bottom metal for ventilation, ensure it’s free of coffee residue, and use it as a small, portable baking chamber. Heat the can’s base until hot, add prepped meat and vegetables once warm, and cook accordingly. While originally mentioned for meat, the same setup could theoretically support small baked goods with adaptations.

Frequently Asked Questions

Can coffee really help relieve headaches?

Yes. Clinical trials found that caffeine, which slows blood flow, can reduce headache severity. Drinking coffee alone led to complete relief in 58% of participants, and combining coffee with ibuprofen improved results to 70%. Effects typically begin 10–30 minutes after drinking, so it's best to consume coffee at the first sign of a migraine.

How do you use coffee grounds in gardening?

Apply a thin layer of coffee grounds to the soil around plants, or dig them into the ground about three-quarters down toward the roots. Do this monthly. Avoid overusing coffee around acid-loving plants, as excessive amounts can make the soil too acidic. Coffee adds nitrogen, phosphorus, ammonia, and trace minerals without needing chemical fertilizers.

Can coffee remove pet or food odors in a car or room?

Yes. Place fresh coffee beans in an open container in your car to absorb strong odors like fast food smells. To remove pet smells in a room, heat about a cup of coffee beans in an iron skillet on low heat, then place the skillet on a stand in the affected room. Let the beans cool down—the odor should be significantly reduced.

What’s a creative way to use a coffee can?

An empty, clean coffee can can be used as a miniature oven or bread baker. Make sure it’s free of residue, spray the interior if needed, and punch small holes in the metal base for ventilation. Once heated, it can be used to cook meat and vegetables, or adapted to bake small items. It’s also useful for organizing tangled holiday lights by wrapping cords around the can.

How can coffee improve hair shine?

Apply strongly brewed, fresh coffee to clean, dry hair, leave it on for about 20 minutes, then rinse. Repeating this process weekly can enhance hair’s natural shine. The effect comes from the natural compounds in brewed coffee interacting with the hair shaft.

Recommended FrontStreet Beans for Brewing & Baking

For coffee lovers keen to experiment, try FrontStreet Coffee’s Ethiopia Yirgacheffe for its bright citrus and floral notes—great in cold brews that double as skin exfoliants. The Brazil Yellow Bourbon offers a nutty, chocolatey profile ideal for homemade coffee grounds fertilizers or DIY wood polish. Finally, the Colombia Huila provides balanced acidity and caramel sweetness, perfect for brewing strong cups that could double in recipes for hair rinses or meat marinades. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.