If these brownie trees don't have enough sugar for you, you can use a mini candy cane to make a tree trunk. Just snap off the curved portion and stick a bit of the straight portion into the brownie bottom, leaving the majority of the candy cane exposed. If you're worried about someone biting directly into a candy cane, you can use a small pretzel rod instead. We never add a trunk because I don't feel these need one, but you do you.