Add eggs, one at a time, mixing well after each addition.
Sift together flour, salt, baking powder, and baking soda.
Mix together sour cream and vanilla extract.
Add flour and sour cream to butter/egg mixture. Do this by adding ½ cup flour at a time and alternating with a little bit of sour cream until all ingredients are added and batter is blended.
Drop by tablespoons onto cookie tray lined with silpat.
Bake at 350 degrees for 7-10 minutes, or until cookies are just browned around the edges and no longer wet on the top.
Cool completely and frost and decorate if desired.
Nutrition Information does not include frosting.Nutrition information calculated using myfitnesspal is provided as a courtesy, but will vary depending on the specific brands of ingredients you use. Please consult with your doctor regarding specific health need