Created by JostLori on November 26, 2013
Step 1: In the bowl of an electric mixer fitted with the paddle attachment, combine flour, sugar, cocoa, salt, cinnamon, and cloves. Add butter; mix on low speed until butter is the size of small peas, about 5 minutes.
Step 2: Add egg; mix until ingredients come together to form a dough.
Step 3: Preheat oven to 350 degrees. On a lightly floured work surface, roll out dough to just thicker than 1/8 inch. Brush off excess flour; transfer dough to a 10-inch tart pan with a removable bottom. Press dough into bottom and up sides of pan; trim excess flush with edge.
Step 4: Lightly prick bottom of dough all over with a fork. Chill until firm, about 30 minutes.
Step 5: Bake shell until firm, about 15 minutes. Immediately sprinkle chocolate over bottom of shell; smooth with a spatula.