Preheat oven to 350°F (175°C). Generously grease a Bundt pan with butter or nonstick spray.
Cut each biscuit into four equal pieces.
Combine sugar and cinnamon in a zip-top bag. Add biscuit pieces and shake until coated.
Layer half of the coated dough and nuts in the pan. Repeat with remaining dough and nuts.
In a small saucepan, melt butter and brown sugar over medium heat until smooth.
Pour the butter mixture evenly over the dough in the Bundt pan.
Bake for 35–40 minutes or until the top is golden brown and fully set.
Let cool for 10 minutes in the pan. Invert onto a serving plate. Serve warm.