Preheat oven to 350 degrees.
Line 2 baking sheets with foil and grease with cooking spray.
Mash potatoes, but leave in chunky bits.
Mix in cheese, bacon bits and the milk.
Unroll dough onto cutting board and press into 14×8-inch rectangle.
Firmly press perforations to seal.
Spread mixture evenly across crescent rolls and tightly roll up dough.
Press to seal. Cut into 14 slices.
Place slices cut side up onto greased baking sheets.
Bake for 15-18 minutes or until golden brown.
Leave to cool for 5 minutes and then top each slice with sour cream. Serve and enjoy.