This 420 canna syrup recipe shows you how to make THC lean (sizzurp) at home with 4 simple ingredients. Cannabis simple syrup is one of the most versatile infused products you can make — it mixes into any drink, stores for months, and can be precisely dosed by the tablespoon. Fordee’s batch yields approximately 17 mg THC per tablespoon using 5g of decarbed cannabis.
420 Canna Syrup Recipe: Ingredients
- 2 cups water (470 ml)
- 2 cups white granulated sugar (~400 g) — 1:1 ratio for standard syrup
- 3 tablespoons vegetable glycerin
- ¼ teaspoon citric acid (optional — extends shelf life)
- 5g decarboxylated cannabis (ground, stems removed)
- Cheesecloth for straining
- Dark glass bottle for storage
How to Make This 420 Canna Syrup Recipe Step by Step
Step 1 — Decarb Your Cannabis
Decarboxylation converts THCA to THC, activating the psychoactive compound before infusion. Spread 5g of ground cannabis on a baking tray and bake at 110–115°C (230–240°F) for 45 minutes. Let cool completely. If possible, freeze the decarbed cannabis in a glass jar — it dumps out cleanly without sticking.
Step 2 — Make the Cannabis Simple Syrup Vegetable Glycerin Base
For the cannabis simple syrup vegetable glycerin base:
- Combine water and sugar in a non-stick pot. Stir briefly to mix.
- Add 3 tablespoons of vegetable glycerin. Glycerin helps bind THC into the syrup, though it’s not as efficient as fat-based carriers. It also adds slight thickness and smoothness.
- Heat on high until simmering, then reduce to medium. Do not boil aggressively — aim for a gentle steady simmer.
- Add the decarbed cannabis directly to the simmering syrup. Stir to submerge.
- Simmer for 15–20 minutes, stirring regularly. Keep the heat low enough to maintain a simmer without boiling over.
Step 3 — Add Citric Acid and Strain
After 15–20 minutes of simmering for this 420 canna syrup recipe:
- Add ¼ tsp citric acid. Stir in. This extends shelf life from 4–5 weeks to potentially 3–6 months when refrigerated. Citric acid also brightens the flavor slightly.
- Remove from heat. Let cool for a few minutes.
- Set a cheesecloth over a dark glass bottle, secured with clamps or held in place. Pour or ladle the hot syrup through the cheesecloth to strain out all plant material.
- Squeeze the cheesecloth to extract every drop — the remaining pulp can be reused in cookies or other edibles.
- Seal the bottle and let cool completely before refrigerating.
THC Lean Simple Syrup Recipe: Dosing and Storage
For this THC lean simple syrup recipe using 5g of decarbed cannabis at approximately 18% THC:
- Total batch ≈ 1130 mg THC
- Per tablespoon ≈ 17–18 mg THC (conservative estimate)
- Starting dose: ½ tablespoon (~8–9 mg THC) for new users. Wait 90 minutes before taking more.
Use a free online THC glycerin calculator (search “glycerin tincture calculator”) to estimate the potency of your specific batch based on your cannabis’s THC percentage and amount used. This 420 syrup homemade infused batch stores in the fridge for up to 6 months with citric acid, or 4–5 weeks without it. Use a dark glass bottle — UV light degrades THC over time.
Infused Lean Sizzurp DIY: Flavor Variations
The infused lean sizzurp DIY base is neutral in flavor (sugar + cannabis). To create flavored versions:
- Fruit syrup — Add a handful of blueberries, strawberries, or raspberries to the pot while simmering. Muddle them first for more flavor extraction. Strain with the cheesecloth as normal.
- Citrus syrup — Add lemon or orange peel strips during the simmer phase. Remove before bottling.
- Herbal syrup — Add fresh or dried lavender, mint, or rosemary to the simmering base for an aromatic 420 canna syrup recipe variation.
- LorAnn extracts — Add a few drops of any LorAnn flavoring at the end (off heat) before straining for intense concentrated flavor without cooking time.
Frequently Asked Questions
What is vegetable glycerin used for in this 420 canna syrup recipe?
Vegetable glycerin acts as a binder and thickening agent in this cannabis simple syrup vegetable glycerin base. THC binds better to fats and alcohol than to water, so glycerin provides some level of binding that pure sugar-water doesn’t offer. It also gives the syrup a slightly viscous, smooth texture similar to commercial syrups.
Can I make a 2:1 ratio version of this THC lean simple syrup recipe?
Yes — use 2 parts sugar to 1 part water (e.g., 4 cups sugar to 2 cups water) for a thicker, richer simple syrup. The higher sugar content makes a more concentrated syrup that mixes well into cocktails and iced drinks. The 1:1 ratio in this 420 canna syrup recipe is lighter and more versatile.
Does the 420 syrup homemade infused need to be refrigerated?
Yes. Even with citric acid, this 420 syrup homemade infused product should be stored in the refrigerator in a sealed, dark glass bottle. Refrigeration extends shelf life and prevents mold. The syrup will thicken slightly when cold but returns to normal consistency at room temperature.
References
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