Heat the oven to 375 degrees. Melt the chocolate and butter in a small saucepan over low heat; stir until smooth. Set aside to cool slightly. Combine the sour cream, 2 tablespoons oil
, egg, and sugar in large mixing bowl
. Beat the mixture on medium speed until creamy. Add the chocolate mixture to the sour cream mixture and beat on low speed. Add the flour
, baking powder and salt. Beat on low speed until mixed. Let the dough stand for 10 minutes / the mixture will set up slightly. Spoon rounded spoonfuls 2-inches apart on ungreased cookie sheets
. Bake for 7 minutes or just until tops of the cookies start to set. DO NOT OVERBAKE. Immediately remove the cookies to a cooling rack. Cool for 10 minutes.