First I made fudge brownies with chocolate ganache and peanut butter cups. It's very hard to go wrong with these - people love them. And if you need to take a dessert in the car and don't want to worry about a cake box or a pan, just bake them directly in small mason jars and pack them in the car with all the rest of your luggage. I froze these overnight before packing them up to make the drive.
I used to be very precise with my ganache recipe, but now I just wing it and it seems to work out fine. Too thin? Add more chocolate.
Then I made chocolate peppermint bark sugar cookies - also incredibly easy. Cookie dough that bakes all at one time? I like it. I am not really a peppermint kind of person, but these things are addictive.
Now to just stay out of them while we make the drive...