Don't you just love trying new cookie recipes? I know I do and when I find one that's really, really good, I like to share the wealth! These little gems are so scrumptious so when the babies come to grandma's house to visit, these will be added to the cookie jar!!!
In a medium bowl, combine four, baking powder, salt and whisk to combine.
Combine sugar, butter, vanilla extract and beat until creamy with an electric mixer.
Add egg and sour cream and continue to incorporate.
Add the flour mixture to cream mixture and beat until incorporated. Melt chips and 1 t. milk in microwave and stir until well melted and combined. Pour melted cool chocolate over batter and mix gently with spoon to make a marble effect. Do not over mix.
Drop onto ungreased cookie sheet. Bake 15 to 20 minutes. Do not overbake. Do not brown. Transfer to cooling rack.