How to Make Weed Brownies: A Complete Step-by-Step Guide

Before you start: cannabis edibles are only legal in states/countries where recreational or medical marijuana is permitted. Always check your local laws before proceeding.
What You’ll Need
Here’s a full ingredients and equipment list for a standard 9×9 inch pan (about 16 brownies):
| Item | Quantity | Notes |
| Cannabis (dried flower) | 3.5g – 7g | Adjust for desired potency |
| Unsalted butter | 1/2 cup (113g) | Or coconut oil as substitute |
| Brownie mix (boxed) | 1 standard box | Or from-scratch recipe |
| Eggs | 2 large | As per brownie mix directions |
| Water | 1/4 cup | As per brownie mix directions |
| Cheesecloth / fine strainer | 1 piece | For straining cannabutter |
Step 1: Decarboxylate Your Cannabis
This is the most important step most beginners skip. Raw cannabis contains THCA, which won’t get you high. Heating it converts THCA into THC – the active compound. Skip this and your brownies won’t work.
- Preheat your oven to 245°F (118°C).
- Break cannabis into small pieces and spread on a baking sheet lined with parchment.
- Bake for 30-40 minutes, stirring every 10 minutes.
- Remove when it looks light brown and toasted. Let cool before handling.
Step 2: Make Cannabutter
THC binds to fat – that’s why butter is the vehicle. Here’s how to infuse it properly:
- Melt 1/2 cup of butter in a saucepan on low heat. Add 1/2 cup of water (prevents burning).
- Add your decarbed cannabis. Stir to combine.
- Simmer on very low heat (160-200°F) for 2-3 hours. Do NOT let it boil.
- Strain through cheesecloth into a container. Squeeze out every drop.
- Refrigerate until the butter solidifies on top. Discard the water underneath.
Step 3: Bake the Brownies
- Preheat oven to 325°F (163°C) – slightly lower than the box instructions to preserve THC.
- Prepare the brownie batter using your cannabutter in place of regular butter.
- Pour into a greased 9×9 pan and bake for 20-25 minutes.
- Test with a toothpick. Let cool fully before cutting into 16 pieces.
Dosage Guide – How Strong Will They Be?
Potency depends on the strain and how much cannabis you use. This table gives a rough estimate using 3.5g at 15% THC:
| Experience Level | Recommended Dose | Brownies to Eat | Onset Time |
| Beginner | 2.5-5mg THC | 1/4 to 1/2 piece | 45 min – 2 hours |
| Intermediate | 5-15mg THC | 1 piece | 30 min – 1.5 hours |
| Experienced | 15-30mg THC | 1-2 pieces | 30-60 minutes |
Storage & Shelf Life
- Room temperature: Keep in an airtight container for up to 3-4 days.
- Refrigerator: Up to 1 week wrapped individually.
- Freezer: Up to 3 months. Wrap in plastic then foil to prevent freezer burn.
- Always label edibles clearly – especially if others have access to your kitchen.
Common Mistakes to Avoid
- Skipping decarboxylation – your brownies won’t have any effect without it.
- Eating more because ‘nothing is happening’ – edibles take time. Wait at least 2 hours.
- Using too much heat when making cannabutter – this degrades THC.
- Not straining properly – plant material in the butter makes brownies taste bitter.
Start low, go slow – that’s the golden rule with edibles. Once you find your ideal dose, you can replicate it consistently every time.







