Preheat the oven to 350°F and grease a 12-cup capacity bundt pan really well with cooking spray.
Combine the granulated sugar with the cinnamon in a bowl or a zip top bag. Cut each biscuit into quarters—between the two cans, you’ll have 64 biscuit pieces total.
Toss 16 biscuit pieces into the cinnamon sugar and roll around until fully coated. Arrange them evenly in the bottom of the bundt pan and sprinkle with ¼ of the chopped pecans.
Repeat the process: dip 16 more biscuit pieces in cinnamon sugar, layer them in the pan, and sprinkle on another ¼ of the pecans. Continue layering until all the biscuit pieces and pecans are used.
Sprinkle any leftover cinnamon sugar over the top of the biscuits and wiggle the pan to shake the cinnamon sugar around evenly.
Next, make the glaze. In a small saucepan over medium heat, melt the butter and brown sugar together. Bring to a gentle simmer and cook for about 30 seconds, whisking continuously until the sugar dissolves.
Pour the butter-sugar mixture evenly over the biscuits in the pan. Swirl the bundt pan around to make sure the glaze coats all the biscuit pieces evenly and gets into every nook and cranny.
Bake at 350°F for 35–45 minutes, or until the biscuits have risen and are no longer doughy. To test, pull a piece of biscuit away from the middle of the pan—if it pulls away cleanly, it’s done. If it’s still stretchy or gummy, bake a little longer. If you have an instant-read kitchen thermometer, the monkey bread will be done when the center reaches 190°F.
Let the monkey bread cool in the pan for 5 minutes. Place a plate over the pan and carefully flip it so the bread slides out. Do this while it’s still hot, before the glaze sets, so it releases easily.
Reattach any chunks of biscuit that might have stuck in the pan, and let the monkey bread sit until just cool enough to eat. Serve warm and enjoy!