Key Takeaways
- Before infusion, you should heat your Cannabis to activate THC.
- Coconut oil and olive oil are the best carriers because they contain a lot of fat.
- A temperature range of 160°F to 200°F ensures the cannabinoids are not burned out.
- The usual proportion is 1 cup of oil to 7-10 grams of cannabis, but the quantity can vary depending on the strength.
- Once made, you can use this infused oil for baking, sautéing, or as a topical.
Many people interested in homemade edibles struggle with the same issues: inconsistent potency, unpleasant flavors, or store-bought products that feel overpriced and unreliable. Without a proper foundation, even simple recipes can result in wasted ingredients and disappointing effects.
Cannabis oil solves many of these problems, but only when it’s made correctly. Learning how to make cannabis oil correctly can help you control the strength and preserve strain characteristics. Even creating a versatile base you can use across multiple recipes, from baked goods to everyday meals, becomes effortless.
In this guide, you’ll learn how to make THC oil step by step, including the role of decarboxylation, the infusion process, and proper storage methods to ensure maximum potency and shelf life.
Why Make Your Own THC Oil?
The surge in the legalization of cannabis has created a vast market of ready-made edibles. However, making weed oil for edibles at home still enjoys popularity due to several reasons.
First, it is cost-effective. It is much cheaper to purchase cannabis flowers in bulk and then infuse your own oil than to buy the individual 10mg servings at a dispensary.
Also, it’s customizable. You can shop by strains to customize the oil to your needs, whether you want the invigorating effects of a Sativa or the calming effects of an Indica. According to a study published in Molecules, the lipid-based infusion method is one of the most efficient ways to deliver cannabinoids to the body, as THC is highly lipophilic (fat-soluble).
Moreover, you can save on artificial preservatives, high-fructose corn syrup, and dyes that are common in factory-made and baked cookies. When you have the key to the kitchen, you have the key to the medicine.
Science of Cannabinoids and Lipids
To comprehend how to make THC oil, you need to know the interaction between cannabinoids and fats. Cannabidiol and Tetrahydrocannabinol (THC) are hydrophobic. This implies that they are not soluble in water. They, however, dissolve well in lipids (fats) and alcohols.
By heating the cannabis in vegetable oil, the fat molecules enclose the THC molecules. This not only extracts the compound from the plant material but also helps protect it during digestion.
These fats are metabolized in the liver to generate Delta-9-THC, which is then converted to 11-Hydroxy-THC, a more potent compound with a longer duration of action.
That’s why a marijuana oil recipe seems to be much more intense and does not fade as quickly as flower smoking or vaping the same volume.

The Essential Supplies
The tools and ingredients you need before beginning your weed oil recipe include the following. A “mise en place” (putting everything in its place) helps avoid temperature peaks and spills.
- Cannabis: 7-14g of high-grade cannabis flower. You can use “shake” or “trim” to save money, but you might need to add more to make it strong.
- Carrier Oil: 1 cup of refined Coconut oil, Extra Virgin Olive oil, or Avocado oil.
- Grinder: A hand grinder or kitchen scissors. Do not use a coffee grinder that turns the weed into dust.
- Baking Sheet: Rimmed baking sheet for decarboxylation.
- Double Boiler or Slow Cooker: These tools provide indirect heat, which is essential for preserving sensitive compounds.
- Cheesecloth: Layered four times for the cleanest possible strain.
- Glass Jar: An amber-colored Mason jar is the best option for UV light.
- Thermometer: A digital thermometer or any other thermometer used to measure the temperature of the cooking oil.
Step 1: Decarboxylation
If you skip this step, your cannabis-infused oil will not be psychoactive. Raw cannabis has THCA that is non-intoxicating. On heating, THCA is deprotonated and becomes THC. This same process occurs immediately when you light up a joint, and for oil, we have to do it gradually in the oven.
- Prep: Turn on your oven to 240°F (115°C). Check the oven temperature with an oven thermometer, as most home ovens vary by up to 20 degrees.
- Grind: Crush your marijuana into tiny, pea-sized balls. Don’t grind it into a fine powder, or it will not be possible to strain it.
- Bake: Place the cannabis in a baking pan, on parchment paper, or on a silicone baking sheet, and evenly spread it.
- Wait: Bake for 30-45 minutes. Gently shake the baking tray every 10 minutes to achieve an even “toast.” The flower should change from bright green to a medium brownish-green and smell slightly nutty.
Pro Tip: To contain the smell in this phase, put your cannabis in a sealed mason jar and place the jar on its side on the oven rack. Shake the jar every 15 minutes. This prevents the aromatic compounds (terpenes) from entering your kitchen.

Step 2: Choosing Your Carrier Oil
When learning how to make THC oil for cooking, the type of fat used influences the taste, shelf life, and bioavailability of the THC.
1. Coconut Oil
This is one of the gold standards for weed oil for baking. Coconut oil is rich in saturated fats, i.e., Lauric acid. These fats offer a reliable anchor for cannabinoids. Unrefined (virgin) coconut oil is strongly flavored with coconut, and refined coconut oil is neutral.
2. Olive Oil
Excellent for savory dishes, salad dressing, or for dipping bread. Olive oil contains a lot of monounsaturated fat. Although it contains fewer cannabinoids than coconut oil, it is much easier to digest and is liquid at room temperature.
3. Avocado Oil
Due to its high smoke point and numerous healthy fats, avocado oil is a good substitute for those who prefer a neutral flavor profile but do not want to consume coconut products.
4. Butter
Although technically, it is used when making canna-butter, butter is a traditional option. Butter, however, contains water and milk solids and thus will burn or go rancid much more quickly than pure oils.
Step 3: The Infusion Process
There are several ways to infuse, but the aim is to maintain the temperature at 160°F to 200°F. When you exceed 220°F, then you run the risk of accelerating THC degradation and terpene loss, and turning your potent oil into a sleep-inducing oil (as THC degrades into CBN).
Slow Cooker Method
This is the “set it and forget it” weed oil recipe. It is also the safest option for beginners, since slow cookers are designed to maintain low temperatures over time.
- Combine: Add your cannabis, which is decarboxylated, as well as 1 cup of oil, to the slow cooker.
- Water (Optional): A little water (1/2 cup) may be added to help maintain temperature control and to rinse off some of the green chlorophyll flavor. The water and oil will automatically separate in the fridge.
- Cook: Set to “low” for 4 to 6 hours. Stir every hour to ensure the heat is evenly distributed.
- Monitor: Use your thermometer. When it reaches 200°F, switch the cooker off for 15 minutes, then switch it back on.
Double Boiler Method
This technique offers the most significant control and is faster than using a slow cooker.
- Preparation: Add your oil to the top pot and water to the bottom.
- Melt: When the oil melts, add in your decarboxylated cannabis.
- Simmer: Maintain a low simmer in the bottom pot. The steam gently heats the top pot.
- Time: Infuse for 2 to 3 hours. In this technique, there needs to be more supervision to prevent the water in the bottom pot from drying up.
Step 4: Straining and Refining
After the infusion is complete, you must remove the plant material. This step determines the final clarity and flavor of your oil.
- Setup: Place a funnel over a glass Mason jar. Line the funnel with four layers of cheesecloth.
- Pour: Pour the oil-cannabis mixture slowly through the cloth. Let gravity do the work.
- Golden Rule: Don’t squeeze the cheesecloth. It is tempting to get the last drop, but the squeeze forces chlorophyll, waxes, and bitter plant tannins into your oil. This causes your edibles to be swampy.
- Cooling: Leave the oil on the counter to cool down. Do not put a lid on it until it is cool, as condensation can lead to mold.

Calculating Potency: The Math Behind the High
Understanding the potency of cannabis-infused oils is vital for a safe experience. To determine how much of your starting substance to use, you have to know the THC percentage of your starting substance.
$Total/mg =(weight in grams x 1000) x(THC percentage x 0.88)
The weight loss during decarboxylation is explained by a multiplier of 0.88.
Example:
Assuming that you take 10 grams of the flower that has 20 percent THC:
- $10g \times 1000 = 10,000mg$ of flower.
- $10,000mg \times 0.20 = 2,000mg$ of THCA.
- 0.88 x 2000mg of activated THC = 1760mg.
When you put this in 1 cup (16 tablespoons) of oil, then each tablespoon would have about 110mg of THC. This is highly potent! For a standard 10mg dose, you would only need about 1/4 teaspoon.
Advanced Tips for the Home Chef
1. Sunflower Lecithin
Typically, many professional edible makers include one tablespoon of sunflower lecithin per cup of oil during infusion. Lecithin is an emulsifier that helps the cannabinoids bind more effectively to the fats. Better still, it is a bio-availability enhancer and will help your body absorb the THC more quickly and efficiently.
2. Terpene Preservation
The oils, which give cannabis its smell, are referred to as terpenes and add to the entourage effect. They are highly volatile and have low-temperature evaporation. If you want something more full-spectrum than just using a strain and preserving that specific feel, keep your infusion temperature at the lower end (160°F) and never over 2 hours.
3. The “Water Wash"
If your oil tastes too grassy, you can “wash” it. Combine the prepared oil with hot water in a jar in equal quantities. Shake and place it in the refrigerator in an inverted position. The oil will freeze, and the water (with the bad tastes and impurities) will remain in liquid form. Drain the foul water away, and you are left with a tastier product.

Safety and Responsible Consumption
The most common error when taking cannabis edibles is taking too many doses. Since the liver has to process the oil, it may take between 45 minutes and 3 hours to experience the effects.
- Start Low: If new to edibles, the initial dose should be 2.5-5mg.
- Wait: Do not eat more for at least 2 hours.
- Label Everything: It is always important to label your jars. Store them locked in a cabinet, particularly when there are children or pets at home.
Frequently Asked Questions
Q: How long does homemade THC oil last?
A: THC oil can last between 6 and 12 months when it is kept in an airtight glass container in a calm and dark environment. You can extend the period through refrigeration, but coconut oil will solidify.
Q: Can I use the leftover plant material?
A: Yes! The resulting “sludge” contains trace cannabinoids (typically 10-15 percent of the original content). Some combine it with pesto or smoothies, or apply it to topical salves to treat muscle soreness. However, the flavor will be robust and earthy.
Q: Does making weed oil make your house smell?
A: Yes, the infusion process and decarboxylation process emit a powerful cannabis aroma. To reduce the smell, decarboxylate in a sealed mason jar in the oven or in a slow cooker with a tight-fitting lid. A fan and a burning candle with a strong smell, or incense, can also be used to cover the smell.
Q: Can I use a microwave to decarboxylate?
A: It is not recommended. Microwaves are uneven heaters and can easily form hot spots, which vaporize THC rather than activate it. Use a standard oven or a specialized decarboxylation device to achieve consistent results.
Q: What is the best oil for high potency?
A: Coconut oil, in its refined form, is generally regarded as the best, as it contains a high percentage of Medium Chain Triglycerides (MCTs). The liver rapidly uptakes these fats; therefore, the effect may occur more quickly than with long-chain fats.
Conclusion
Learning how to make cannabis oil is a rite of passage for any serious cannabis consumer. It transforms a simple flower into a versatile kitchen staple that can enhance your wellness routine or your next dinner party. By following the “low and slow” rule and ensuring proper decarboxylation, you can create a professional-grade product in your own kitchen.
Remember to experiment with different strains to find the effect that works for you. Whether you need a high-CBD oil for recovery or a high-THC oil for creativity, the power is now in your hands.
