When making an 8x8 inch pan of brownies how much bud butter should I use?

You will want to use the amount of oil that the brownie recipe calls for. If it is 1/2 cup, then make the canna-oil (coconut oil works best) before hand, then measure out 1/2C for the recipe. Simply simmer the buds in the oil for 20 minutes, make sure it reaches 220* F if you want it activated, and then strain the leaves out. You can eat the leaves later for a nutritional boost. (Add to smoothies!)