To make THC brownies, decarboxylate ground cannabis in a 240°F oven for 40 minutes, infuse it into butter or oil for 2 to 3 hours, and bake that infused fat into a standard brownie recipe. The full process takes about four hours. Potency is the hard part: one batch can hold hundreds of milligrams of THC, so weigh your cannabis and cut small pieces before anyone takes a bite.
What you need to make THC brownies
- 3.5 to 7 grams of cannabis flower or trim
- 1 cup (2 sticks) unsalted butter or 1 cup coconut oil
- 1 cup water, for the stovetop infusion
- A brownie mix or from-scratch recipe that calls for 1/2 cup of oil or butter
- Baking sheet, parchment paper, grinder, fine mesh strainer or cheesecloth, saucepan or double boiler, oven thermometer
- A kitchen scale that reads grams
Butter and oil are the two easiest carriers because brownie recipes already call for one of them. Cannabis sugar works too, but you will need to adjust the recipe for it.
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Step 1: Decarboxylate the cannabis
Raw cannabis holds THCA, which does not get you high. Heat converts THCA into THC. Skip this step and your brownies will be weak no matter how much weed you use.
Oven method
- Heat the oven to 240°F (115°C). Use an oven thermometer, since many ovens run hot and THC starts to degrade past 300°F.
- Break the flower into small pieces with a grinder or your hands. Pull out stems and seeds.
- Spread the cannabis in a single layer on a parchment-lined baking sheet.
- Bake for 40 minutes, stirring at the 20-minute mark.
- It is ready when it smells nutty and looks light brown, not black or green.
Some bakers run 250°F for 30 minutes and get the same result. Stay inside the 220°F to 250°F window and avoid scorching the plant matter.
Step 2: Infuse the butter or oil
THC binds to fat, so butter or oil pulls it out of the plant. A stovetop batch takes 2 to 3 hours, while a countertop infusion machine or a double boiler cuts that to about one hour.
Stovetop cannabutter
- Melt 1 cup of butter in a saucepan with 1 cup of water. The water keeps the butter from burning.
- Add the decarbed cannabis and simmer on low for 2 to 3 hours, holding 160°F to 180°F. Bubbles should be tiny, not rolling.
- Stir every 20 minutes.
- Strain through cheesecloth or a fine mesh strainer into a jar. Press the plant material to recover the butter trapped inside.
- Chill the jar. The butter hardens on top of the water. Poke a hole, pour the water off, and you have cannabutter.
One cup of butter takes up most of the THC from 3.5 to 7 grams of flower. More cannabis means more potency, but it also adds a grassy taste that cocoa hides well.
Step 3: Bake the brownies
Follow your brownie recipe as written and swap the butter or oil for the same amount of cannabutter or canna oil. Do not add extra. The fat ratio controls texture.
- Bake at 325°F instead of 350°F and add 5 to 10 minutes if the center still jiggles. THC leaves the batter at high heat.
- Add 1/2 teaspoon of salt or a tablespoon of espresso powder to mask the cannabis flavor.
- Cool the pan for 30 minutes before cutting. Warm brownies crumble and you lose track of the dose.
- Slice the pan into 16 or 24 squares and write the number down.
Step 4: Dose your batch
Dosing is the step most home bakers skip. Do the math first, then cut the brownies to match the number you want.
Example: 3.5 grams of flower at 18% THC holds about 630 mg of THC. Home extraction pulls out 70% to 80% of it, so plan on 440 to 500 mg for the whole pan. Cut 24 pieces and each one lands near 20 mg. For a 5 mg serving, cut the pan into 96 small squares or use less cannabis next time.
These numbers are estimates. Only lab testing tells you the real potency of your batch. A 5 mg starting dose and a 10 mg standard dose come from state edible rules, not from your oven.
How long do THC brownies take to kick in?
Most people feel effects 30 to 90 minutes after eating. Peak effects arrive around 2 to 3 hours and fade over 4 to 6 hours. Wait at least 2 hours before you eat a second piece.
Why edibles hit harder than smoking
Your liver converts THC into 11-hydroxy-THC, a compound that reaches the brain with more force. That is why 10 mg in a brownie can feel stronger than a full joint for someone with no edible experience.
How to store THC brownies
- Airtight container in the fridge for up to 2 weeks
- Freezer for up to 3 months, wrapped in foil and then a freezer bag
- Label the container with the date and the milligrams per piece
- Keep them away from children and pets, ideally in a locked box
Legal and safety notes
THC brownies are legal for adults 21 and older in US states with legal cannabis programs. Possession limits and home-production rules differ by state, so check your state law before you bake. Do not drive after eating one.
Start with 5 mg or less if you have never tried an edible. Overconsumption causes anxiety, nausea, and a racing heart, and those feelings can last for hours. It will not kill you, but it makes for a long night.
FAQ
Can I use a boxed brownie mix?
Yes. Buy a mix that calls for oil or butter and use your infused fat in the same amount. Skip mixes that call for water only.
Can I make THC brownies with trim or shake?
Yes. Use two to three times the weight of flower, since trim holds less THC. Decarb and infuse it the same way.
Can I skip decarboxylation?
Not with raw flower. Already-vaped weed is decarbed, so you can infuse it into butter straight, though the potency will be low.
Why are my brownies weak?
The common culprits are a skipped decarb step, too little cannabis for the amount of butter, or an oven that ran cold during baking. Tolerance plays a role too.