To prepare a sour cream oatmeal cookies baked goods recipe, first you need to prepare your ingredients. First, you'll need 2 cups of rolled oats, 1 cup of brown sugar, 2 tablespoons of butter, and 1 teaspoon of vanilla extract. Then, add your dry ingredients to the wet ingredients and mix them together until they're just combined. Next, pour your batter into your greased and floured cookie sheet. Bake the cookies for 10 to 12 minutes or until the edges are golden brown.