We’ve all heard the story of someone eating a raw bud of cannabis and waiting for an hour, only to feel absolutely nothing. If you want to make your own edibles, you cannot skip the most crucial step of the process.

That step is called decarboxylation (often just called “decarbing”).

In its raw, freshly harvested state, cannabis doesn’t actually contain THC. It contains a chemical precursor called THCA (Tetrahydrocannabinolic acid).

THCA has its own nutritional and anti-inflammatory benefits, but it is entirely non-psychoactive. It will not get you high. To convert that THCA into the intoxicating THC we all know, you have to remove the “A” (the acid ring).

How Heat Unlocks THC

When you smoke or vape cannabis, decarboxylation happens instantly. The flame of your lighter or the heating element in your vape instantly converts the THCA to THC as it hits your lungs.

But when you are cooking with cannabis, you have to recreate this process manually before you infuse your butter or oil. If you just throw raw cannabis into a brownie mix and bake it, the inside of the brownie will never get hot enough for long enough to properly decarb the weed. You’ll be left with very expensive, normal-tasting brownies.

Step 1: Grind It (But Not Too Fine)

Break your cannabis flowers down into smaller pieces. You don’t want it turned into a fine powder, or it will burn easily and taste terribly bitter in your edibles. A coarse grind is perfect.

Step 2: Prep Your Pan

Line a baking sheet with parchment paper. This prevents the sticky resin on the buds from cementing itself to your pan. Spread your coarsely ground cannabis evenly across the paper.

Step 3: The Golden Temperature and Time

Preheat your oven to 240°F (115°C). This is the absolute sweet spot. If your oven is too hot, you will vaporize the THC and the flavorful terpenes into the air. If it’s too cold, the conversion won’t happen. Bake the cannabis for 30 to 40 minutes.

Step 4: The Visual Check

You will know your cannabis is perfectly decarbed when it changes from a vibrant green to a toasted, light golden-brown color. It should smell incredibly fragrant, almost like toasted nuts and pine. Once it cools, your cannabis is fully “activated” and ready to be infused!

Reliable Source: Experts at Leafly and essential culinary science dictate that 240°F for 30-40 minutes provides maximum THCA to THC conversion without degrading plant material.

Fun Fact: Decarboxylation actually happens naturally over a very long period! If you leave cannabis sitting in a jar at room temperature for a year or two, a significant portion of the THCA will slowly degrade into THC, and eventually into sleep-inducing CBN.