Parmesan Smashed Potatoes

I made these potatoes last night.  We are taking dinner to the Daniel and Haylee, who just had baby Isaiah join the family, and I thought this would make a good side item to go with meatloaf (from another cookbook) and roasted carrots (Ina's own).  I made 2/3 of a recipe, and it made a lot of potatoes.  If you're just cooking for 2, I recommend halving the recipe.  I used light sour cream, but other than that, followed the recipe exactly.  The potatoes ended up a little runnier than what I'm used to, but that could have been due to my questionable measuring skills.  The taste was wonderful.  I'll be making them again.  Sorry, I don't have a  picture!  By the time I remembered to take one, they were already out the door.