Start by grabbing all of your ingredients out of the fridge and pantry, you don't want to get half way through and realize you are forgetting something!
I like to use my electric stand mixer for this recipe, but a whisk and a mixing bowl will work as well if you are willing to put in some elbow grease!
Start by adding your butter and sugar to your mixing bowl and cream together for a minute or two. Next, add your egg, sour cream and vanilla to the mixing bowl and mix well until thoroughly combined.
In a small, separate bowl, combine your flour, baking soda, baking powder, salt and corn starch and mix well with a fork to evenly distribute.
Gradually add this dry mixture to your wet mixture, a cup at a time, mixing on a slow speed until it is fully combined and starts to form a dough. Don't overmix!
Once the cookie dough has been made, flour a clean surface, like your counter. Separate the dough in to 2 or 3 chunks. Dusting your hands in flour you are going to grab a chunk of the dough and place it on the floured surface. Sprinkle a small amount of flour on the top of the dough and then roll it out with a rolling pin to 2' thickness. Next we are going to cut out perfectly circular cookies! I used a mason jar lid, but a glass jar would work too! Press this into your cookie dough as a cookie cutter until you have circular cookies. Do this with all three chunks of dough, it is just easier to do it in segments!
Place the cookies on a baking sheet, you can fit about 8-10 cookies as they don't spread much. I do recommend lining your baking sheet with parchment paper.
Bake these for 8-9 minutes at 350 degrees F. This recipes makes about 12-15 cookies.
For the icing, you will combine all ingredients in your electric mixer and mix on high until your icing reaches your desired consistency. Add a little more powdered sugar if it is too thin or a splash of milk if it is too thick.
Wait until your cookie have fully cooled before icing! I like to put my icing in a large freezer bag, cut the corner off and then pipe the icing through.
