I have learnt the hard way not to give out recipe's, something I used to have no problem with. In my experience, that unless someone is actually standing in your kitchen and miming every movement the cake will not turn out the same even though you have given them the recipe. This is due to different brands, cake pans, measuring cups, oven temperatures and timing. I used to give out recipe's no problem but after being accused more than once of specially leaving out some ingredients when the cake doesn't turn out identical I have hardened my heart (something I find hard to do bc it's not my nature) and now just say that bc it's business I can't/won't give out recipes. Most people understand this but you have the odd one who won't. I had a very good friend who has taken umbrage to this and is always asking me how to do this that and the other and when I deflect her questions she gets all offended and goes into a speech on how she is not going into competition with me etc etc and I somehow always end up telling her what she wants to know. Long story short, I have a much cooler relationship with her now bc of this; I feel if she was a good enough friend she wouldn't push it when I tell her (nicely, too nicely) no & then I wouldn't give in to her, tell her and then be furious with myself so I have found the easiest way to deal with the problem is to have a lot less contact with her which pains me.