Cut each biscuit into bite size pieces.
Combine sugar and cinnamon.
Use a slow cooker liner OR coat sides and bottom of slow cooker with some of the melted butter.
Dip each biscuit piece in melted butter and then in the sugar mix.
Place coated biscuit pieces in layers in the bottom of the crockpot.
Cook on High for 1.5 – 2 hours.
Whisk together powdered sugar and milk to make a glaze
Transfer the cooked Monkey Bread to a plate and drizzle with the glaze. Serve immediately