You can't "make weed" from anything. The only way have your own supply of free weed is to grow marijuana then follow proper harvesting, drying and curing techniques. However, growing marijuana is extremely illegal and you will go to jail if you are caught.
Yes, make it the same way you would normally, but instead of 1oz. of weed, use 3 oz. of stems, PS. The more stems used, the better the brownies will be. And make sure there are (no) seeds in the mix, or else bad tasting brownies. Seeds Do nothing for you, but to grow you another plant.
my hair never use to grow but... if you cut the ends of every 2 weeks your hair will grow like a weed trust me it works my hair grew from my shoulders to my waist in just 3 months. but make sure you brush the ends of your hair to prevent split ends.