W01fg4ang is posting good stuff here. This is science, not guesswork.
For some reason some Americans don't believe in it & argue against it working at all, despite never trying it. They insist on convoluted methods that result in a whole day's work for ineffective or weak edibles.
For anyone reading this, this gentleman and I have had extensive arguments about this where he repeats himself, intentionally misquotes and misunderstands what I'm posting, and never provides actual facts backing up any of his claims, which are counter to well established science. You're welcome to listen to him, and you'll likely get high. But you can get just as high on a fraction of the amount of weed he says to use if you follow a version of the well established process I use. Your choice.
My current recipe:
(Personally I like to make iso hash out of my weed first, for a number of reasons. I like vaping it more, it's fun, and when you make oil out of hash there's no nasty plant matter but it continues to extract and get stronger the longer you store it. If you don't know how to make iso hash it's the easiest thing in the world. You grind up your weed - I use a coffee grinder or blender - put it into a conical coffee filter, pour 90% isopropyl alcohol through it onto a plate, and point a fan over the iso until it's evaporated. Then scrape up with a razor. More time soaking in the alcohol results in more actives being extracted, but also in a much less pure product. This is completely optional however!)
Decarb: Put your hash or ground weed in an oven safe container like a ramekin. Cover tightly with foil and bake in a preheated oven (I use a toaster oven) at 225 for 30 minutes. USE AN OVEN THERMOMETER. They are cheap. This is not a hard and fast temp/time combo. You can experiment with different times, for example 2 hours at 200 works but it's intensely sedating. Not my cup of tea. The lower the temp the longer the time needed. 225 and 30 minutes produce the best high in my opinion. Obviously highly subjective.
Cook: After your container has cooled to room temperature, unseal and pour in coconut oil. You only need enough to cover the weed. Stir in a small amount (like a quarter teaspoon or so) of lecithin. (This is optional but makes an enormous difference because lecithin separates and surrounds the individual active molecules and makes it much easier for your body to process.) Reseal and cook at 225 for 45 minutes.
You're done! I cap this stuff and take it straight. Be aware the high will become stronger and more sedating if you cook further with it, so you can compensate by cooking it into the oil for a shorter time or skipping it altogether depending on the recipe, but you need to leave the hash or bud in the mix when you bake. Obviously that's another point in hash's favor because it's not noticeable the way plant bits are in a cake or brownie.
I'm not claiming this is the best possible recipe. I'm always experimenting and refining. But this recipe has worked for me and everyone else I've shared with 100% of the time.
I honestly feel sorry for people so misinformed.
Me too. And I feel frustrated remembering how I wasted weed following bad recipes online, and frustrated knowing other people will be led to do the same.