A recipe for sour cream cookies is Mother's Sour-Cream Cookies from Martha Stewart, calling for sour cream as well as butter, flour, sugar and vanilla. There are also Sour Cream Oatmeal Cookies and Sour Cream-Chocolate Chip Cookies recipes.
Combine 1 1/2 cups of all-purpose flour, 1/2 teaspoon of baking power, 1/4 teaspoon of baking soda and 1/4 teaspoon of salt in one bowl, and cream together 1 cup of sugar, 1/3 cup of unsalted butter, 1 egg, 1/3 cup of sour cream and 1/4 teaspoon of pure vanilla extract is another bowl. Slowly mix the flour mixture into the butter and sugar mixture. Once a dough forms, dollop spoonfuls of the mixture onto a cookie sheet, and top with sanding sugar. Bake the cookies at 375 degrees Fahrenheit for eight to 10 minutes.
To make the sour cream version of oatmeal cookies, whisk or sift together 1 1/2 cups of flour, 1/2 teaspoon of baking soda and 1/2 teaspoon of salt, and toss 1 cup of chopped dates or raisins in 1/4 cup of the mixture. In a separate bowl, beat together 1/2 cup of sugar and 1/2 cup of butter, and then add in 1 egg and 1 teaspoon of vanilla extract. Mix the flour mixture into the butter mixture, and fold in 1/2 cup of sour cream, 1 cup of quick-cooking rolled oats and the dates. Place spoonfuls of the dough on a greased cookie sheet, and bake them at 375 degrees Fahrenheit for 12 to 15 minutes.