Cream sugar, eggs and shortening. Combine sour cream, baking soda and vanilla; add to creamed mixture. Add dry ingredients and mix well. Drop by heaping tablespoonful onto a greased baking sheet. Bake at 350�F for 8 to 12 minutes. For variety, add chocolate chips, raisins or nuts to the dough before baking. To make rolled cookies, add 1 cup of flour to the dough, chill, then roll out and cut into shapes.