Cannabis Cooking Temperature Guide: The Science of Decarboxylation and Infusion
Temperature is the single most important variable in cannabis cooking. Get it right and you produce potent, consistent edibles. Get it wrong and you either waste your material entirely or produce something so unpredictable it ruins the experience. This guide covers every critical temperature threshold you need to understand, from raw flower to finished dish.
Why Decarboxylation Is Non-Negotiable
Raw cannabis contains very little THC. What it contains in abundance is THCA — tetrahydrocannabinolic acid — the non-intoxicating precursor. THCA must lose a carboxyl group (a molecule of CO2) through heat to become the psychoactive THC your body can use. This process is called decarboxylation, and without it, your edibles will be essentially inert.
When you smoke or vaporize cannabis, decarboxylation happens instantly at the high temperatures involved. But in cooking, you need to decarboxylate deliberately and carefully before infusing your cannabis into a fat.
The Optimal Decarboxylation Window
The ideal decarboxylation temperature for THC is between 220°F and 240°F (105°C to 115°C). Within this range, THCA converts efficiently to THC without significant degradation.
At 220°F (105°C): Decarboxylation proceeds slowly. You will need 45 to 60 minutes for full conversion. This lower temperature is forgiving — there is little risk of overshooting into degradation — but requires patience.
At 240°F (115°C): Decarboxylation is faster, completing in approximately 30 to 40 minutes. This is the sweet spot most experienced cannabis cooks use. The conversion is efficient and the risk of THC degradation remains low.
At 250°F (121°C) and above: You begin to risk converting THC into CBN (cannabinol), which is mildly sedating but far less psychoactive. If your goal is a sleepy edible, a slightly higher decarb temperature might be intentional, but for maximum potency, stay at or below 240°F.
For CBD-dominant flower, the decarboxylation temperature is slightly higher: 250°F to 280°F (121°C to 138°C) for 60 to 90 minutes, because CBDA requires more energy to convert than THCA.
Decarboxylation Method
Spread ground cannabis evenly on a parchment-lined baking sheet. Cover with aluminum foil to prevent terpene loss. Place in a preheated oven at 240°F for 35 to 40 minutes. The cannabis should turn from green to a light golden brown and smell strongly aromatic. If it turns dark brown, your oven is running hot.
A common mistake is trusting your oven’s thermostat. Home ovens can be off by 25°F or more. An oven thermometer is an essential tool for cannabis cooking — a $10 investment that prevents ruined batches.
THC Degradation Thresholds
Understanding when THC starts to break down is just as important as knowing when it forms.
300°F (149°C): THC begins to degrade noticeably. At this temperature, extended exposure will convert a meaningful percentage of THC to CBN.
350°F (177°C): Significant THC degradation occurs within minutes. This is a common baking temperature, which creates an important distinction between oven temperature and internal food temperature (more on this below).
392°F (200°C): THC boils. At this temperature, THC will vaporize out of your food entirely if exposed directly. This is the temperature at which dry herb vaporizers extract THC, as explored in our guide to the best dry herb vaporizers in 2026.
Optimal Infusion Temperatures
Once your cannabis is decarboxylated, the next step is infusing it into a fat — typically butter, coconut oil, or olive oil. THC is fat-soluble, so it bonds to fats during the infusion process. Temperature control during infusion is critical.
Cannabutter
The ideal infusion temperature for butter is 160°F to 180°F (71°C to 82°C). At this temperature range, the milk fats in butter efficiently absorb cannabinoids without scorching. Never let your butter reach a full boil (212°F / 100°C), as this will cause the butter to separate and the milk solids to burn, producing off-flavors.
Infusion time: 2 to 3 hours at 160-180°F, stirring occasionally. Longer is not necessarily better — most cannabinoid extraction occurs within the first two hours, and extended cooking can degrade THC.
Stovetop method: Use the lowest burner setting or a double boiler. A double boiler is strongly recommended because it makes it nearly impossible to exceed 212°F. Add one cup of water per pound of butter to help regulate temperature.
Slow cooker method: Set to low (which typically maintains 170-190°F). This is the most forgiving method for beginners. Infuse for 3 to 4 hours.
Coconut Oil
Coconut oil is arguably the best infusion medium because of its high saturated fat content — over 80% — which provides maximum surface area for cannabinoid bonding. Infuse at 160°F to 200°F (71°C to 93°C) for 2 to 3 hours. Coconut oil can handle slightly higher temperatures than butter because it lacks milk solids that burn.
Olive Oil
Olive oil works well but has a lower saturated fat content, so it may not extract cannabinoids quite as efficiently. Infuse at 160°F to 200°F for 2 to 3 hours. Extra virgin olive oil has a smoke point of around 375°F, so there is no risk of reaching it during infusion.
Oven Temperature vs. Internal Food Temperature
This is the concept that trips up most cannabis cooks. When a brownie recipe says “bake at 350°F for 25 minutes,” the brownies themselves never reach 350°F internally. The oven surrounds the food with 350°F air, but the internal temperature of a moist baked good rarely exceeds 210°F (99°C) — because the water inside the food limits the temperature until it evaporates.
This is excellent news for cannabis edibles. It means that baking cannabis-infused brownies at 350°F will not destroy the THC, because the THC is embedded in fat within the batter, and that interior environment stays well below the degradation threshold for the duration of normal baking times.
However, there are important caveats. Thin items like cookies, crackers, and pizza toppings can reach much higher internal temperatures because they have less mass and moisture to buffer the heat. The edges and surfaces of any baked good will be significantly hotter than the center. For maximum potency, avoid recipes that produce thin, crispy results and favor dense, moist preparations.
Temperature Quick Reference
| Process | Temperature | Time |
|---|---|---|
| THC Decarboxylation | 240°F (115°C) | 35-40 min |
| CBD Decarboxylation | 260°F (127°C) | 60-90 min |
| Butter Infusion | 160-180°F (71-82°C) | 2-3 hours |
| Coconut Oil Infusion | 160-200°F (71-93°C) | 2-3 hours |
| THC Degradation Begins | 300°F (149°C) | — |
| THC Boiling Point | 392°F (200°C) | — |
Dosing Considerations
Even with perfect temperature control, dosing is the hardest part of making edibles. If your starting material is 20% THC and you use 7 grams, you have approximately 1,400 mg of potential THC (7,000 mg × 0.20). Assuming 80-90% decarboxylation efficiency and 60-80% infusion efficiency, your final infusion might contain 670 to 1,000 mg of THC. Divided into 50 servings, that produces 13 to 20 mg per serving — a moderate dose for most people.
For those new to edibles, starting with 5 mg per serving is the standard recommendation. The onset time for edibles is 30 minutes to 2 hours, and the effects last 4 to 8 hours. This is very different from inhalation, and patience is essential. For more on choosing the right approach for your experience level, see our guide to cannabis strains and their effects.
Temperature mastery transforms cannabis cooking from guesswork into a reliable, repeatable process. Invest in a good thermometer, respect the thresholds, and you will produce edibles that are both potent and consistent every time.