No one would call me a great cook but stock is one of my things.
Image starting with raw chicken, which ideally includes lots of bones, so wings good, breast fillets not so good.
Roast it in the oven to 'caramelise' It's obvs not caramel as it doesn't involve sugar but does make the meat much tastier. It is possible to start with the raw meat but roasted is better.
Ideally use the same container for roasting as for making stock. If this isn't possible, scrape together all the drippings etc into the new container.
Add onion, stick celery, a carrot and garlic, 'bouquet garn' or at least a bay leaf or two. Oh, ideally roast the garlic with the flesh do it has caramelised, too
Add water. Enough to cover the bones and loosen the delicious bits stuck to the bottom. Slow cook or simmer for hours/overnight.
Strain into a jug and leave to cool. Once cold, the consistency should be of jelly with interested dark brown 'tasty bits' of meat
Season to taste.
The amount of water is a balance between how much stock you end up with and how concentrated the flavour is. My mother typically ended up with the Pryex pint jug full of stock from a biggish chicken. I make the same volume from a bag of wings or whatever I have to hand.
I'm not sure my own stock tastes better than the 'fresh stock' provided by a well known supermarket. However, I am seriously invested in the emotional power of my mother's stock. She used to bring me a couple of containers of her own stock whenever she visited, which I kept for emergencies.
Often just felt better thinking oh, no, this feels terrible but wouldn't be bad enough to justify one of 'Muts' stock.
Sigh.