I work in an office where we celebrate every one's birthday. At the beginning of the year everyone writes 2 or 3 of their favorite treats on a slip of paper and we all draw some one's name. I drew my boss's name, and his requests were Rice Krispie Treats and Krispy Kreme Donuts. Not much fun for someone who likes to make things from scratch and be creative in the kitchen, but I had to grant his birthday sweets wishes... so I combined them! It was too perfect... like, duh, the metamorphosis of the two was inevitable.
So, not really a recipe... I just made the classic Rice Krispie Treats recipe and spread it out in a single layer about 1-inch thick. After it cooled a little, I used a biscuit cutter and a small circle cutter to make donut shapes. Then I dipped them in a copycat Krispy Kreme glaze (recipe here) and added sprinkles. They turned out adorable, and were a hit with my coworkers.