Preheat the oven to 350°F (175°C).
Grease the bundt pan generously with butter or non-stick cooking spray.
In a mixing bowl, combine the granulated sugar and ground cinnamon, mixing well.
Open the biscuit dough cans and cut each biscuit into quarters.
Take each quarter and roll it into a ball.
In a separate bowl, melt the butter. Then, stir in the brown sugar and vanilla extract until combined.
Dip each ball of dough into the butter mixture, then roll in the cinnamon-sugar mixture, coating well.
Layer the coated dough balls in the greased bundt pan, and sprinkle chopped nuts between the layers if using.
Pour any remaining butter mixture over the top of the assembled dough balls.
Bake for 30 minutes or until the top is golden brown and the dough is cooked through.
Remove from the oven and let cool for 10 minutes before inverting onto a serving plate.
Serve warm, and optionally drizzle with a simple glaze made from powdered sugar and milk.