ChatterBank2 mins ago
pork pie
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For more on marking an answer as the "Best Answer", please visit our FAQ.I think pork pies must be pink for the same reason as bacon, ham, gammon and sausages are. It's because they have a small amount of salt-petre in them -- a simple preservative, effective in very small amounts.
The nitrite in the salt-petre reacts with the myoglobin in the meat to form the strongly pink colour. Myoglobin is a form of haemoglobin found in muscles. It normally absorbs oxygen, but it also forms a stable complex with nitrite. The globins are red when combined with something, even when it's not oxygen -- a similar thing happens with haemoglobin and carbon monoxide, giving poisoned people a healthy-looking flush. We are all familiar with this from Casualty when the evil landlord's not maintained the gas water heater properly.
I used to make raised pies with rabbit meat and a little bacon (yum!). When cooked, around each piece of bacon would be a little patch of pink rabbit meat, while the rest of the rabbit remained pale brownish. This must have been the nitrite diffusing out of the bacon.