Cannabis expert Susan Squibb brings in chef Jessica Catalano of The Ganja Kitchen Revolution to help do the math on the THC potency in a batch of pot brownies.

Hey, Cannabist!
I cook up 15 grams of trim in coconut oil, and my flower tests between 12 percent to 15 percent THC. If I make brownies in a 13 x 9-inch pan and cut them into 10 servings instead of 18 (like the brownie mix says), do I have 15 milligrams THC in each slice or 150 milligrams? Please help, thanks in advance!
— Kitchen Chemist 

Hey, Kitchen Chemist!
What’s cooking? I’m glad you’re double-checking the THC per serving in your pot brownies. There’s a big difference between 15 milligrams THC and 150 milligrams THC per serving … and by my math your numbers are off target. I compute your THC per serving to be 180 milligrams or 225 milligrams per serving, depending on the THC potency of your flower. Either way, that’s a super-potent end result.

It’s important to get the marijuana math part straight in any mouthwatering homemade brownie recipe, so let’s walk through the numbers together. 

Read the rest of this story at The Cannabist.