I never thought Cinnabon buns could get any better, until I made Funfetti ones! Cinnabon + colorful sprinkles is the best breakfast to celebrate a birthday. You may be thinking, that sounds like a big commitment first thing in the morning, but I have a shortcut recipe for you. Instead of making the Birthday Cake Cinnamon buns from scratch, you can buy all of the ingredients at the store and add a little TLC. What You’ll Need. Pillsbury Grands Cinnamon Rolls Funfetti Cake Mix Rainbow Jimmies (Sprinkles) 2 tablespoons of Butter Softened Sheet Pan Candles Preheat oven to 350 degrees. Open the Grands Cinnamon Rolls and unravel them flat onto…