What makes a food kosher?!
What makes a food kosher?
What does kosher mean?
Answers:
first of all, there is no such thing as a 'blessing' to make food kosher!!!
something is kosher if it follows the laws set down in leviticus, with additions made by the rabbis. meat and milk can never be mixed or combined, can't be cooked using the same utensils, or served on the same dishes. fish has to have fins, scales and not be scavengers. kosher animals have to have hoofs and chew their cuds. the list of animals which are acceptable was decided millenia ago. the method of slaughter for animals has to have the throat slit, in one movement, with a knife which has no imperfections, nicks, or dullness to it's blade. after slaughter, the lungs are inspected, to see if the animal had been diseased, if so, then there are questions for a rabbi to decide, if it's fit to be kosher. the hindquarters of any kosher animal normally aren't used, it's too hard to remove the sciatic nerve which runs through it. vegetables and fruits have rules as well, as does produce from the land of israel.
there are many many volumes of information on this, i hope that this is helpful for a short, off the cuff answer.
btw, there are many certifying organizations, the "o-u", the "o-k" and others, which certify foods as kosher, and have their
symbol placed on the packaging, to show interested consumers that the food is kosher.