Canna oil is a cooking or wellness oil that has been infused with cannabis. It’s made by slowly heating cannabis flower in a carrier oil like coconut oil, olive oil, or MCT oil, which pulls the plant’s active compounds (cannabinoids like THC and CBD) into the fat. The result is a versatile oil you can cook with, take by mouth, or apply to your skin.
Why Cannabis Needs Fat
Cannabinoids are lipophilic, meaning they dissolve in fat rather than water. This is the entire reason canna oil exists. Without a fat to bind to, cannabinoids pass through your digestive system poorly. CBD, for example, has a bioavailability of roughly 6% when taken on an empty stomach, but absorption improves significantly when paired with dietary fats. Infusing cannabis into oil solves this problem by pre-dissolving the cannabinoids into a form your body can actually use.
Coconut oil is the most popular base because it’s high in saturated fat, which binds cannabinoids efficiently. MCT oil (a refined coconut product) works similarly and stays liquid at room temperature. Olive oil is another common choice, especially for savory cooking, though its lower saturated fat content may extract cannabinoids slightly less efficiently.
Decarboxylation: The Step That Activates Cannabis
Raw cannabis doesn’t contain much THC or CBD. Instead, it contains their inactive precursors, THCA and CBDA. Heat converts these into their active forms through a process called decarboxylation. If you skip this step, your canna oil won’t produce noticeable effects.
Decarboxylation happens between 200°F and 245°F. The sweet spot for most home preparations is 220°F for 30 to 40 minutes. Higher temperatures work faster but risk destroying the compounds you’re trying to preserve. At 230°F, THCA converts to THC in about 30 minutes, while CBDA needs around 45 minutes at the same temperature. At 265°F, the process takes only 9 minutes for THC and 20 minutes for CBD, but the margin for error shrinks considerably.
Most people decarboxylate their cannabis in an oven before adding it to the oil. Some skip this step and rely on the infusion process itself to handle the conversion, but a separate decarboxylation step gives you more control over the outcome.
How Canna Oil Is Made
The basic process is simple. After decarboxylating the cannabis, you combine it with your carrier oil and heat the mixture at a low temperature for an extended period, typically 2 to 4 hours. Stovetop methods use a double boiler to prevent scorching. Slow cookers work well because they maintain a consistent low temperature with minimal attention. Some people use purpose-built infusion machines that automate the temperature and timing.
Temperature control during infusion matters for more than just cannabinoid extraction. Cannabis contains terpenes, the aromatic compounds responsible for flavor and some therapeutic effects, and these evaporate at specific temperatures. Humulene boils off at just 225°F, and caryophyllene at 266°F. The more robust terpenes like myrcene (334°F) and limonene (349°F) can survive moderate cooking temperatures. Keeping your infusion below 200°F preserves the broadest range of terpenes, though this means longer infusion times.
Once infusion is complete, you strain out the plant material through cheesecloth or a fine mesh strainer. What remains is a green-tinted oil ready to use.
Common Uses
Canna oil shows up in three main contexts: cooking, sublingual dosing, and topical application. Each delivers cannabinoids differently.
- Cooking and baking: Canna oil substitutes for regular oil in nearly any recipe. Brownies and cookies are classics, but it works in salad dressings, soup broths, sauces, and anything else that calls for oil or melted fat. The key limitation is heat. Baking at 350°F won’t destroy the cannabinoids already dissolved in the oil (the oil itself stays cooler than the oven temperature), but frying at very high heat can degrade them.
- Sublingual use: Placing a small amount of canna oil under your tongue allows cannabinoids to absorb through the thin tissue there, bypassing the digestive system for faster onset. Effects typically begin within 15 to 30 minutes this way, compared to 45 minutes to 2 hours when eaten in food.
- Topical application: Cannabis-infused oils can be applied directly to the skin or used as a base for balms and salves. Topicals are most commonly used for localized muscle soreness, tension, and inflammation. Cannabinoids applied to the skin generally don’t enter the bloodstream in significant amounts, so topical use typically doesn’t produce the psychoactive effects associated with THC.
Potency and Dosing
The strength of homemade canna oil depends on two variables: the potency of the cannabis you start with and the ratio of flower to oil. A common starting ratio is one cup of oil to 7 to 10 grams of cannabis, but this produces oil of wildly different strength depending on whether the flower contains 10% or 25% THC.
Without lab testing, you won’t know the exact milligram content per teaspoon. The practical approach is to start with a very small amount, a quarter teaspoon or less, wait at least two hours to gauge the effects, and adjust from there. Edibles take longer to kick in and last longer than inhaled cannabis, and the effects can feel more intense because your liver converts THC into a more potent form during digestion.
Storage and Shelf Life
Properly stored canna oil stays potent for 1 to 2 years. The three enemies of cannabinoid stability are light, air, and heat.
Light exposure is the single greatest factor in cannabinoid degradation, especially in oil-based preparations. Store your canna oil in an opaque or dark glass container. Air oxidation also breaks down THC over time, converting it to a less psychoactive compound, so airtight containers matter. Temperature below 70°F is ideal, though room temperature is generally fine. Refrigeration extends shelf life and is a good idea if you’ve made a large batch. The carrier oil itself can also go rancid, so use the same freshness guidelines you would for any cooking oil.