My friend Allison first introduced me to Pink Box a year ago....now I find I'm addicted to the Tutti Frutti! I have literally tried every donut here, but I personally can't go wrong with a bag of Tutti Frutti from Pink Box!
Close second favorite is the apple fritter!
The Centennial Hills location offers a drive thru which is nice so you can hurry home to eat the delicious donuts. The downside to the drive thru is that you can't easily see which donuts are available, but the staff is usually friendly and helpful.