One little chocolate donut and a few gulps of milk sounds like just the right amount of sweet goodness to reward yourself for getting your taxes done. Go ahead, you deserve it.
Don't let anyone tell you that you can't combine foods you love to create a delicious chimera. For instance, one of the best burgers I've ever eaten had peanut butter, bacon and a fried egg on it. Sounds bizarre, tastes AMAZING. Also, it was the only thing I ate that day, talk about a calorie bomb!
Someday I want to coat my whole arm in icing and dip it in a vat of sprinkles. I wouldn't know what to do next, sadly, once I'm thoroughly spackled with hardening icing and sugary bits. I wouldn't want to eat it, I just want to take pictures of it maybe and call myself "Ol' Donut Arm". I guess just a donut will do.