Cookie Dough:

1. In a large bowl combine sugar and butter. Mix until butter is light and fluffy looking and sugar is well incorporated. Add sour cream, eggs and vanilla; mix well.
2. In a smaller bowl combine flour, baking powder, baking soda and salt,
3. Add dry ingredients to wet ingredients. Mix until everything is just incorporated. Do not overbeat!
4. Cover with plastic wrap and chill in the fridge for about 2 hours.
5. With a 2 tablespoon cookie scoop, scoop out even size scoops of dough and then roll in a ball in your hand and place on a cookie sheet and slightly flatten with your hand so it’s in a circular shape.
6. Bake in a pre-heated 350 degree oven until light golden brown, for 8 to 10 minutes. (you want them soft!)
7. Transfer to a cooling rack and let cool completely before frosting.

Frosting Instructions:

1. Using a mixer, combine butter and shortening until completely combined (about a minute)
2. Add 1/2 cup powdered sugar and beat until smooth, add another 1/2 cup and beat until smooth.
3. Add Vanilla, mix. Gradually add the remaining sugar and milk. Add food coloring if desired. Continue to mix until smooth.