Decarbing Persy Slabs for Rich Butter and Oil Infusions
The smell of cannabis butter simmering on a stovetop is something many home cooks chase, and Australians are no exception. From a Bondi kitchen on a Sunday morning to a townhouse in Fitzroy, more people across the country are curious about turning premium concentrates into infusions they can spread on toast or drizzle over salad. The catch is that raw concentrates like Persy Slabs need activation before they deliver their full potency in food.
Persy Slabs are a high-grade rosin and diamond product from 710 Labs, prized for terpene richness and clarity. When you order from the persydiamondsstore.com selection, the material arrives ready for dabbing, but for edible work the THCa crystals require heat conversion into active THC. Skipping or rushing this step leaves you with butter that smells loud but barely works.
Cannabis rules remain strict across most of Australia, and any home infusion needs to be considered within the current framework. Medicinal cannabis is legal nationally with a prescription through the Therapeutic Goods Administration, while the ACT allows adults to grow a small number of plants and possess up to 50 grams for personal use. Elsewhere, possession and home preparation of cannabis products can still attract criminal penalties, so anyone reading this should know exactly what their state or territory allows before lighting an oven.
Understanding What Makes Persy Slabs Different
Persy Slabs are not your average shatter or crumble. They are a thick, saucy blend of THCa diamonds suspended in high-terpene extract, and the consistency behaves differently from dry flower when heated. The diamonds start to soften well before they fully decarboxylate, which means a careless temperature ramp can evaporate the lighter terpenes while leaving heavier cannabinoids only partially converted.
Because the slab is already a refined extract, there is no plant cellulose, chlorophyll, or moisture to worry about during decarb. That changes the math. You are working with a dense, sticky material that needs gentle, even heat rather than the long, dry cure you would use for trim or flower. Treat it more like tempering chocolate than slow-roasting a joint, and the final infusion keeps its flavour.
Choosing Between Decarb Methods
| Method | Temperature | Time | Best For |
|---|---|---|---|
| Oven on parchment | 105–115°C | 35–50 minutes | Small batches, no special gear |
| Sous vide in vacuum bag | 93–100°C | 60–90 minutes | Even heat, terpene retention |
| Decarb device (Ardent etc.) | 95–110°C | 60 minutes | Set-and-forget, airtight |
| Double boiler in jar | 90–95°C | 45–60 minutes | Budget setup, low odour |
Most Australian home cooks start with the oven method because it requires nothing more than a baking tray and some baking paper. Sous vide fans, especially in Melbourne and Adelaide where immersion circulators have become a staple gift, will get a cleaner result with less smell drifting through the house.
Oven Decarboxylation Step by Step
Preheat your oven to 110°C and line a small ceramic dish or baking tray with parchment. Weigh your slab on a kitchen scale so you can calculate doses later, then break or scoop it into pea-sized pieces with a silicone tool. Spread the pieces across the parchment in a single layer, leaving gaps so airflow can do its job.
Cover the dish loosely with aluminium foil to keep the more fragrant terpenes from venting straight up the oven vent. Slide it onto the middle rack and set a timer for 40 minutes. After the timer goes, pull the dish out and let it cool for ten minutes. The slab will have gone from crystalline and wet to a darker, taffy-like texture that smells nutty and faintly of fuel.
If you want to push further toward CBN-rich effects, extend the session to 55 minutes, but watch the colour. Anything past deep amber is overcooked and will leave your butter tasting flat and grassy.
Sous Vide for the Patient Cook
A sous vide setup gives you the steadiest temperatures, which suits the slow conversion of THCa in a slab. Seal the broken-up slab inside a vacuum bag or a heavy-duty zip-lock using the water displacement method, then clip it into a 95°C bath for an hour and a half. The water surrounding the bag ensures every crystal reaches the same heat at the same moment.
This method shines for people who care about preserving the original terpene profile of the 710 Labs source material. You will notice the bag smells sweet and citrusy rather than the harsh, burnt-biscuit scent an open oven can produce. When the cycle ends, drop the bag into cold water for a few minutes before opening, and you will have a glossy, dark-honey concentrate ready to pour straight into warm butter.
Infusing Decarbed Slabs into Butter
Now that the decarb is done, the infusion is the easy part. For every gram of decarbed slab, melt 100 grams of unsalted butter in a small saucepan over the lowest possible heat. Australian butters from the local dairy aisle work beautifully here, whether you choose a cultured variety from Tasmania or a salted block from your corner store.
Stir the decarbed material into the melted butter and keep the temperature under 90°C. A double boiler setup works better than direct heat because it prevents the mixture from spiking past decarb and burning off the cannabinoids you have already activated. Let it simmer gently for two to three hours, stirring every fifteen minutes.
If you do not own cheesecloth, a clean Chux cloth from the laundry aisle will strain the plant material out without dropping lint into the finished butter. Pour the strained butter into silicone ice cube trays and refrigerate. Each cube of a 1 gram to 100 gram ratio typically contains a measured dose, which makes it easy to bake a single biscuit in Adelaide without overdoing it.
Building Potent Oils and Ghee
Coconut oil remains the favourite infusion medium for many Australians because it pulls cannabinoids efficiently and stays solid at room temperature, making dosing simple. Replace the butter in the previous method with the same weight of refined coconut oil, and keep the temperature gentle. Refined coconut oil adds no coconut flavour to the finished product, while unrefined gives a subtle background note that pairs nicely with curry-inspired bakes.
Ghee, the clarified butter common in Indian cooking across Melbourne's inner north, is another strong choice. With the milk solids removed, ghee tolerates higher temperatures than butter, which means you can infuse it at 110°C without the mixture breaking or tasting burnt. Strain it through a fine mesh strainer lined with muslin and store in a glass jar in the fridge for up to three weeks.
For those interested in a lighter carrier, MCT oil drawn from coconut works well in salad dressings and no-bake treats. Because it is already liquid, MCT oil needs only a 45 minute infusion at 80°C to fully bind with the activated cannabinoids, which makes it the fastest route to a tincture-style drizzle you can measure by the dropper.
Storing, Dosing, and Staying Safe
Label every jar with the date, the ratio, and the strain name so you never confuse a potent cube with regular butter. Store infusions in opaque containers in the fridge or freezer; light and oxygen are the two biggest enemies of shelf life. Frozen butter keeps for six months, while ghee or coconut oil infusions last about a month refrigerated without losing potency.
Dosing is where most home infusions go wrong. A 1 gram slab at full activation decarbed into 100 grams of butter produces roughly 10 milligrams of THC per tablespoon, though the figure shifts with the starting potency of the source material. Start with a half teaspoon in a single serving, wait at least two hours, and resist the urge to top up. Edibles hit slower than vaping, and the experience often feels heavier than expected.
Driving after consuming any cannabis product remains illegal in every Australian state and territory, with roadside saliva tests now standard in New South Wales, Victoria, Western Australia, and Tasmania. Treat these infusions as you would any prescription medication: respect the dose, keep them away from children, and never share with anyone who has not consented. Pair the wait time with something low-key like flicking through some retro graphic tees, and let the infusion speak for itself.