How to Make Potent Cannabutter at Home
Quick answer: To make potent cannabutter at home, heat ground cannabis in the oven at about 240°F for 30 to 40 minutes, then hold it in melted butter and a little water on very low heat for about 2 to 3 hours. Strain it, chill it, pour off the water and store the butter sealed and labeled in the fridge. Careful, even heat at each step matters more than speed.
Why the Oven Step Comes First
Fresh cannabis contains mostly acid forms of cannabinoids. NC State Extension explains that THCA and CBDA are the acid forms, and that decarboxylation, “a process that usually involves heat,” converts them. UGA Extension adds that by heating, THCA is converted into Δ9-THC. That is why almost every cannabutter method starts with a low oven step before the butter. Our full guide on why decarboxylating cannabis is so important covers that step in depth.
What You Need
Supplies only, with amounts left to your own recipe.
- Cannabis flower or trim you trust
- Unsalted butter
- Water
- A grinder or a knife
- A baking sheet and parchment paper
- An oven thermometer
- A saucepan, double boiler or slow cooker
- A wooden spoon
- Cheesecloth or a fine mesh strainer
- A heat safe bowl or jar with a lid
- A label and a marker
Choosing the Starting Material
The butter can only carry what the plant material brings. Use flower or trim that has been dried and stored well, smells fresh rather than musty and shows no sign of mold. Skip anything damp or dusty, since moisture and mold are exactly the storage problems food safety sources warn about. Remove stems and large leaves before the oven step, because they add bulk and a green flavor without adding much else. Old, harsh material tends to make harsh tasting butter, so a small batch from good material is often better than a large batch from leftovers. Keep a simple note of what you used so you can compare batches later.
Stovetop vs Slow Cooker
| Stovetop | Slow cooker | |
|---|---|---|
| Heat control | Needs close watching to stay at a low simmer | Steadier heat on the low setting |
| Attention | Stay at the stove and stir often | Check and stir now and then |
| Smell | Strong in the kitchen | Still strong, but more contained |
| Best for | Small batches and people who like control | Hands off batches |
Either way, the goal is the same: keep the fat warm long enough without scorching. A double boiler on the stove is a middle ground, because the water layer keeps heat gentle.
How to Make Potent Cannabutter Step by Step
- Preheat the oven. Set it to about 240°F (115°C) and check it with an oven thermometer, because many ovens run hot or cold.
- Break up the flower. Coarsely break or grind it. Avoid a fine powder, which is harder to strain.
- Spread it out. Line a baking sheet with parchment and spread the flower in a thin, even layer.
- Bake it. Bake for 30 to 40 minutes, stirring once or twice so the edges do not scorch. Stop when it looks light to medium brown and smells toasted, not burnt.
- Cool it. Let it cool fully before it goes near the butter.
- Melt the butter with water. Melt the butter on very low heat with some water in the pan. The water helps keep the butter from scorching.
- Add the flower. Stir the cooled flower into the butter and water.
- Infuse low and slow. Keep a bare simmer for about 2 to 3 hours on the stove, stirring often, or run the slow cooker on low. Never let it reach a rolling boil, and never leave fat unattended on a burner.
- Strain. Let it cool slightly, then pour it through cheesecloth or a fine mesh into a heat safe bowl. Press gently rather than squeezing hard.
- Chill. Refrigerate the bowl until the butter sets into a solid layer on top of the water.
- Separate. Lift the butter off and pour away the water underneath. Pat the underside dry.
- Label and store. Put the butter in a sealed container and label it with the date and contents.
Storing Cannabutter Safely
Colorado State University Food Source Information lists butter and oils among infused edibles and flags them as a food safety concern. It notes that Clostridium botulinum spores are found on plant material and in soil and can survive cooking temperatures during extraction, and it names infusions made from cannabis extractions, such as oils and butters, among the products of concern. It also says high humidity is a particular concern during storage.
In practice, that usually means:
- Keep cannabutter sealed and refrigerated, and freeze what you will not use soon.
- Keep it dry and cold, and never leave it out at room temperature for long.
- Label the container clearly so nobody mistakes it for plain butter.
- Store it out of reach of children and pets.
For a side topic, our guide explains how edibles differ from smoking.
Cooking With Cannabutter
Use cannabutter where butter already belongs, such as toast, sauces or baked goods, and mix it in well so it is spread through the whole dish. Label anything you share. For flavor ideas, our guide on pairing terpenes with food and drink looks at matching aromas. If you are curious about other ways people use plant resin, see how to make hash.
Troubleshooting
The butter tastes burnt. The oven or the simmer ran too hot. Check the oven with a thermometer, keep the infusion at a bare simmer and add a little more water next time.
The butter is green and bitter. The flower was ground too fine or squeezed hard through the cloth. Break it coarser and press gently.
The butter will not set. It may still be warm, or there is too much water mixed in. Chill it longer, then lift off the solid layer.
Water is trapped in the butter. Pour off all the water and pat the underside dry. Leftover water shortens storage life.
The flower smells grassy after baking. It may need a few more minutes or a more accurate oven temperature. Check with a thermometer before you add more time.
The kitchen smells strong. Use a slow cooker with a lid or a double boiler and run the range hood.
Grit settles at the bottom. Strain through a finer cloth or strain twice.
Sources
- UGA Extension, Circular 1209, Chemistry and Lab Results (PDF): https://fieldreport.caes.uga.edu/wp-content/uploads/2023/06/C1209.pdf
- NC State Extension, Understanding the Relationship Between THC and CBD: https://content.ces.ncsu.edu/understanding-the-relationship-between-thc-and-cbd-in-hemp
- Colorado State University Food Source Information, Marijuana Edibles: https://www.chhs.colostate.edu/fsi/food-articles/complex-food/marijuana-edibles/
FAQ
How can you make potent cannabutter at home?
Start with flower or trim you trust, heat it in the oven at about 240°F for 30 to 40 minutes, then hold it in butter and water on very low heat for about 2 to 3 hours. Strain, chill, pour off the water and store the butter sealed in the fridge.
Why heat the cannabis before making cannabutter?
NC State Extension explains that decarboxylation, a process that usually involves heat, converts the acid forms THCA and CBDA, which is why most cannabutter methods start with a low oven step.
Why add water when making cannabutter?
Water helps keep the butter from scorching and steadies the heat during the long infusion. Once the mixture is strained and chilled, the butter sets on top and the water is poured away.
Why does my cannabutter taste burnt?
The oven or the simmer was too hot, or the pan was left unattended. Check the oven with a thermometer, keep the infusion at a bare simmer, stir often and add a little water to the pan.
How should you store cannabutter?
Keep it sealed, labeled and refrigerated, and freeze what you will not use soon. Colorado State University notes that infused butters and oils are a food safety concern and that high humidity is a concern in storage. Keep it out of reach of children and pets.
