I use a standard brownie recipe, if you don't have a cookbook, search google, there's a million of them out there.

My recipe for ganja butter,

2 ounces leaf
1 pound butter(NOT MARGARINE!!!)

Grind up the leaf
melt butter on low heat
simmer leaf into butter for 15 minutes(be very careful not to burn it, you want to release the THC into the fat of the butter, but not fry the leaf)
after simmering, strain through cheesecloth
cool overnight

use this butter as you would regular butter, don't eat and drive!!!!