Ready In: 4 hrs 40 mins
Prep: 4 hrs 15 mins
Cook: 15 mins
Yields: 48 Cookies
Sift together flour, baking powder, baking soda, cocoa, and salt and set aside.
Cream together butter and sugar.
Add eggs, vanilla, instant coffee and melted bittersweet chocolate.
Fold in yogurt. Fold flour mixture into wet mixture. Do not over mix.
Form dough into 2-12' logs 2' in diameter. Wrap in plastic and chill dough for 4 hours.
Preheat oven to 375°.
Cut 1/4'-1/2' thick slices from the log.
Place on ungreased non-stick baking sheets. Sprinkle with sugar.
Bake for 12-15 minutes until edges are brown. Cool on racks.