Most belly pork recipes recommend cooking the meat at a high temperature at the beginning. And then lowering it for a number of hours.
However, I have found that when I do that, the skin rarely forms decent crackling. Presumably because the skin is still a bit wet and it takes time for it to get hot enough to crackle.
I have only had success when I turn the heat up at the end of cooking.
Why do all these recipes recommend the opposite of what is working for me?
Best Answer
As far as I've always believed there is 3 reasons for it.
I. Theory the high temperature shocks the skin helping the skin crisp up if you've ever put a chip in cold oil you'll notice it takes far longer to crisp up than one dropped into the same oil but once hot. Or a better description is probably ... Have you ever put a poppadum into cold oil? Notice how it never puffs up, just goes brown.
The high heat helps seal the meat I'm theory helping keep the moisture in, even though most of the 'moisture' in belly pork is actually the fat self basting itself.
The high temperature helps raise the interior temperature to above the 'danger zone' quicker.
Now I do agree with you, the initial blast does not make the skin crackle, especially since I cover my meat with foil after the first blast which essentially means the skin then steams for 5 hours. I did however try low from the start once and the end result was a thin crispy but a little chewy almost crackling layer even after half an hour at 230c at the end. So I do think high initial heat plays a crucial role to getting good crackling in the long run even if it doesn't seem like it to begin with.
I would suggest not fixating on any time frame for the initial blast. Keep your oven on full wack until the skin bubbles up, if I can be bothered (it's a bit messy and risks major burns every time) I pour 300c oil over the top of my pork half way into my first blast which really helps the skin blister and results in perfect light crispy skin at the end.