Preheat your oven to 350°F (175°C). Grease a bundt pan with cooking spray or butter.
In a large bowl, combine granulated sugar and cinnamon. Cut each biscuit into quarters and toss the pieces in the sugar mixture until well coated.
Layer the coated biscuit pieces in the prepared bundt pan.
In a separate bowl, mix the melted butter, lemon juice, and lemon zest. Pour this mixture evenly over the biscuit pieces in the bundt pan.
Bake in the preheated oven for 30-35 minutes, or until the top is golden brown and the biscuits are cooked through.
Allow the monkey bread to cool in the pan for about 10 minutes, then invert onto a serving plate.
In a small bowl, whisk together powdered sugar and enough milk to achieve a drizzleable consistency. Drizzle the glaze over the warm monkey bread before serving.