I love these cookies and make them every Christmas. I do not really remember where I got the recipe. I love the combination of chocolate and cranberry or cherry.
Combine flour, cocoa, baking powder and salt in small bowl, set a side.
Beat butter, white sugar and brown sugar until light and fluffy. Beat in egg and vanilla. Gradually beat in flour mixture. Stir in chocolate chunks and cranberries.
Drop dough by 1/4 cupfuls onto ungreased cookie sheets, 3 inches apart.
Flatten dough with bottom of glass dipped in sugar.