The base for most recipes here. One gram of flower per cup of butter lands near 10 mg THC per tablespoon (theoretical), so six tablespoons in a batch of twelve gives about 5 mg each.
Theoretical maximum: it assumes complete decarboxylation (THCA × 0.877) and that every milligram ends up in the food. Real yield is usually lower, which is why you start with one portion and wait. Re-run the maths for your flower →
per tablespoon
2.5510 mg
Start with one. Wait two hours.
Ingredients
1 g cannabis flower (label THCA around 18%; recalculate for yours)
227 g (1 cup) unsalted butter
240 ml (1 cup) water
Flower at a different THCA %? Recalculate the infusion; the recipes that use it then need no changes.
Method
Decarboxylate: break the flower into pea-sized pieces, spread on a lined tray and bake at 115 °C (240 °F) for 35–40 minutes until dry and lightly toasted, not brown.
Image slot · step 1: flower on a lined tray after decarboxylation · 1200 × 800
Melt the butter with the water in a small saucepan over the lowest heat. The water stops the butter scorching and is discarded later.
Image slot · step 2: butter and water melting in a saucepan · 1200 × 800
Add the flower. Hold between 70 and 85 °C (160–185 °F) for 2–3 hours, stirring occasionally. Never let it simmer.
Image slot · step 3: thermometer in the pan reading 80 °C · 1200 × 800
Strain through a fine sieve lined with cheesecloth into a jar. Press gently; squeezing hard pushes bitter plant material through.
Image slot · step 4: straining through cheesecloth into a jar · 1200 × 800
Chill until solid. Lift the butter disc off the water, pat dry and discard the water.
Image slot · step 5: set butter disc lifted from the jar · 1200 × 800
Label the jar with the date, grams of flower, THCA % and the milligrams per tablespoon from the maths below. Fridge up to 2 weeks, freezer up to 6 months.
Image slot · step 6: labelled jar of cannabutter · 1200 × 800
Dosing notes
Potency is a theoretical maximum. Home infusion does not transfer every milligram into the fat, so real tablespoons are usually weaker than the label. That is the safe direction of error.
Doubling the flower doubles the dose of every recipe made with this butter. Change the label.
Can I skip decarboxylation?
No. Raw flower is mostly THCA, which is not intoxicating until heat converts it to THC. The 0.877 factor in the maths is that conversion.
Why so little flower?
Many home recipes use 7–14 g per cup, which puts a single tablespoon at 70–140 mg and makes portioning guesswork. One gram per cup gives tablespoon-scale doses you can divide.
Salted or unsalted?
Unsalted, so each recipe controls its own salt.
Educational content, not medical advice. Effects vary with body weight, tolerance and what else you have eaten. Label infused food with the milligrams per portion and the date, and keep it away from children and pets.
Same maths as cannabutter, dairy-free, and it sets solid so you can portion it by the gram. Used in the gummies, chocolate bark and peanut butter cups.
