Soft Sugar Cookies!

For the dough:
1/2 c. sugar
1/4 c. butter, softened
1 egg
1/4 c. sour cream
1 t. vanilla
1 1/2 c. flour
3/4 t. baking powder
1/4 t. baking soda
1/4 t. salt

For the frosting:
1 c. powdered sugar
1 t. vanilla
1 T. milk
1/4 c. butter, softened

 Preheat your oven to 350 degrees.  With your mixer, cream together butter with sugar until smooth.  Add in sour cream, egg, and vanilla and mix well.  In a large bowl sift together flour, baking powder, baking soda, and salt.  Slowly add the flour, baking powder, baking soda, and salt and mix well.  Measure three tablespoons of dough for each cookie. Use your hands to roll into a smooth ball.  Place on ungreased cookie sheets, making sure to leave about 1 inch between each cookie. Using your hand to lightly flatten the dough a bit.  Bake for 11-12 minutes, then immediately remove from the oven. The cookies will appear under-baked a bit but this is what you want. Let cookies cool before frosting.  To make the frosting, beat butter with a mixer for about 30 seconds, then add in powdered sugar.. Add in vanilla and milk and mix until light and fluffy.  Use a knife to slather each cookie with frosting. Top with sprinkles.