Given a paragraph about cooking, and a set of conversational question answers about the paragraph, generate a relevant question to the topic of the paragraph. The paragraph has the prefix 'CONTEXT:'. Each conversation question has a prefix 'Q:' followed by the answer prefix 'A:'.

CONTEXT: Fudge is basically a chocolate flavored candy.You combine chocolate and a sugar syrup and boil the syrup until you get the desired concentration. Everything else about the recipe is to either minimize sugar crystal size or add flavor.Sweetened condensed milk will do two things-1- give you a nice, caramelly flavor2- Save a little time. Since it has less water to begin with there will be less to boil off. <sep> Q: What kind of milk is the best for making fudge? A: Sweetened condensed milk
Would it be ok to use regular milk?

CONTEXT: There are good quality vegan margarines (Earth balance, Alsan) on the market nowadays, often they are of the interesterified instead of the hydrogenated variety. They are designed to behave and taste similar to butter instead of (as many cheap margarines seem to do) staying spreadable at temperatures where butter would be very firm. Unlike pure coconut or palm oil, they do not act very brittle when cold, and also they soften gradually instead of suddenly melting like eutectic solder. These should be on the top of the list of things to try...Also, some recipes recommend using more than one type of fat in pastry, for more interesting texture (eg such margarine, and smaller flakes of a hardened coconut fat). <sep> Q: Are there any butter alternatives for baking pastry? A: There are good quality vegan margarines (Earth balance, Alsan) on the market nowadays, often they are of the interesterified instead of the hydrogenated variety
Would that give the dough the same consistency as when I use butter?

CONTEXT: Yes, nuts are very fatty, and they will eventually go rancid if this is the case, they will taste very poor. They can also dry out, or in more rare cases (especially if stored improperly) be infested with insects or molds.Generally, they should be good for six months to a year at their best flavor, depending on the variety (in the shell).Five years is a little long. I am not sure I would want to eat nuts that old. <sep> Q: Do nuts ever go bad? A: es, nuts are very fatty, and they will eventually go rancid
What causes them to go rancid?