When you smoke or vape, the lighter does the chemistry for you. But for cooking, baking, or making tinctures, you need to decarboxylate the flower first — convert THCa into active THC.

The Science (Quick)

THCa molecules have a carboxylic acid group attached. Heat removes that group, leaving active THC. The reaction:

The trick is converting THCa without burning off the terpenes that give you flavor + entourage effect.

The Recipe

Equipment: Oven, baking sheet, parchment paper, oven thermometer (your oven dial lies)

Method:

1. Preheat oven to 240°F (115°C) — verify with thermometer
2. Break flower into pea-sized pieces (don't grind — surface area degrades terps)
3. Spread on parchment-lined baking sheet in a single layer
4. Bake for 40 minutes
5. Cool completely before using

Common Mistakes

• Grinding first — increases surface area, accelerates terp loss. Break by hand instead.
• Higher temp "to save time" — burns terps. The 40-min cook is non-negotiable.
• Trusting oven dial — most ovens are off by 15–25°F. Use a thermometer.
• Skipping the cool-down — reaction continues briefly post-oven. Let it rest.

After Decarb

Decarbed flower is ready for:

• Cannabutter / cannaoil (40 min low simmer in fat)
• Tinctures (30 days in alcohol, room temp)
• Capsules (with coconut oil base)

Dosing

1g of 20% THCa flower yields ~190mg active THC after decarb (95% conversion × 0.877 weight conversion factor). Divide by your edible servings.

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