Preheat the oven to 350°F and spray a 12-cup bundt pan with cooking spray really thoroughly.
Pour cinnamon and sugar into a plastic storage bag.
Remove biscuits from the package and cut each one into quarters.
Place the biscuits pieces, 6 to 7 at a time, into the cinnamon and sugar and shake until well coated.
Place biscuit pieces into a well greased bundt pan.
In a large measuring cup, melt the butter in the microwave. Once melted and warm, pour the remainder of the sugar mixture into the butter and stir for 30 seconds until the sugar starts to melt.
Pour over the biscuits. Shake the pan to make sure the butter gets down in between all of the biscuits.
Bake for 35 minutes in the preheated oven.
Let sit on the counter for 10 minutes before flipping over onto a serving plate.
Video
Notes
It is really important that you spray the bottom of the bundt pan really, really well so that none of the deliciousness sticks to the pan.
You can even do the prep the night before. Do all the steps except the baking and then cover the pan of goodness with plastic wrap and refrigerate until you’re ready to put it in the oven.
Place foil or a cookie sheet at the bottom of your oven to catch any boilover of the sugar/cinnamon mixture, so you don't end up with a mess at the bottom of your oven.