the best batch of butter i ever made... I took a large pot filled it half way with water. I then took my grounded up goodness and put it in a Mason jar and added 1lb butter. I put the pot on the stove and then put the glass jar on top of a wire screen inside the pot (so that the glass didnt touch the hot metal directly), i let the pot come to a rolling boil for 20 minutes and then turned it down to a simmer and let it sit for 6 hours.. 3 brownies the size of golfballs were consumed ... my friend said it was simliar to a bad shroom trip, but i heavily enjoyed it.
sorry i know its off topic, but why the heck would you even want to go through the trouble of using a pressure cooker when there are simpler methods to make the exact same product.