Thank you all for the responses....you made some great points and gave sound advice. Admittedly, I'm probably a little more heated about the issue because I've seen how it affected Moms and scouts in my den. The suggestions to actually write the copy are great. It would be a lot harder for the committee to ignore me if I've done the work. I don't even mind if the rules suggest that scouts should take on the challenge and bake with someone who doesn't really know their way around the kitchen...I know this is meant to be fun. It just needs to be worded in a way so non-traditional families can jump in on the fun too. However, since I don't cook I may be backing myself into a corner here :-)
For the guy who gave the father/daughter dance example---point well taken but I do think the cake auction is different. If the father/daughter dance invite said that only Dad's can attend with their daughters because we all know every Dad has 2 left feet and they're absultuely not allowed to take any lessons or advice from Mom it would really change the meaning of the whole thing, don't you think? The cake auction rules can so easily be changed to include everyone. Also, the cake rules are making sexist assumptions that men can't cook (and woman can!) which isn't the right message to send cub scouts.
Anyway, thanks again to all. I'm new to this forum and it's great to know there's help out there when you need it! I have been rolling this around in my head far too long and I'm ready to take some action to make it right.