How to Make THC Lean — 4 Ingredient Cannabis Syrup Recipe

Step 2 — Mix Rosin With Vegetable Glycerin

Add 1 tablespoon of vegetable glycerin directly to your decarbed rosin. Use a silicone stirrer and mix until the vegetable glycerin cannabis emulsifier and rosin become one smooth, homogeneous mixture — no oil blobs floating around. A coffee cup warmer helps keep the mixture liquid while you stir. For a true double-boiler, place your glass container in a pot of warm water to gently heat while mixing.

Step 3 — Make the Cannabis Syrup With Rosin Base

In a separate pot, combine 1 cup sugar and 1 cup water over medium heat. Stir continuously until all the sugar dissolves. This cannabis syrup with rosin base needs the sugar fully dissolved before you add the concentrate mixture — don’t rush this step. Keep the heat low enough that the mixture doesn’t boil violently.

Step 4 — Combine and Finish the THC Lean Recipe

Once the sugar water is ready and your rosin-glycerin mix is homogenous, pour the concentrate mixture into the simple syrup while stirring. Continue stirring on low heat for a couple of minutes until the THC lean recipe looks like a single, uniform color. Remove from heat before it starts boiling. Warning: hot sugar syrup causes severe burns — use heat-resistant gloves and keep children away from the stove.

Step 5 — Bottle and Store

Pour the finished cannabis simple syrup into a clean glass bottle using a funnel. Let it cool completely to room temperature before refrigerating — putting hot syrup in the fridge can crack the glass. Shake the bottle every few minutes while it cools. Shake before every use. Store in the fridge for up to 4 weeks.

Cannabis Simple Syrup Dosing

To calculate cannabis simple syrup dosing, use a calculator like scientificedibles.com. For example: 2 grams of rosin at around 70% THC yields approximately 1,400–1,800mg total THC in the batch. If the batch makes 300ml of syrup, that’s roughly 4.5–6mg per millilitre. Start with 1–2ml to test your tolerance before consuming more.

How to Use THC Lean

Once you know how to make THC lean, the uses are endless. Add it to drinks to sweeten and infuse at the same time, drizzle it over desserts, mix it into lemonade or iced tea, or take it straight by the teaspoon. Because cannabis simple syrup dosing can vary based on your concentrate strength, always start low and wait 1–2 hours before taking more.