Dude, if you're both feeling it I'd definitely say go for it. Like, one of my best memories is when my ex and I first started dating and we made dinner together. I "accidentally" got a bit of peanut butter on her cheek (we were making a stir fry and we used peanut butter for quick flavoring) and we ended up suspending dinner for a few minutes to make out. Luckily we regained control enough to finish making dinner and eat, THEN we fucking went at it.
If you go a similar route, I'd suggest setting up some romantic candles around the house, putting together a good playlist of acoustic-y kind of folk music type stuff to set the mood, and if you've got a fireplace get it going (especially since it's getting colder). Is this your place by yourself? Or your parent's house? Either way, I'd try and arrange things so that if the possibility arises you can definitely take advantage of the fact that this girl now thinks you're the shit, and why shouldn't she? You just put together an awesome meal, and showed her how creative you can be. Girls dig creativity and originality, so even though I'm kind of giving you this idea, make it your own and add some spice to it. Good luck man!