Chocolate Sugar Dough

Directions

1. 1
   Sift together the cake flour, cocoa powder, and salt into a medium bowl, and stir with a whisk.
2. 2
   Set aside.
3. 3
   In the bowl of an electric mixer fitted with the paddle attachment, cream the butter at low speed for about 2 minutes, or until it is soft and fluffy.
4. 4
   Slowly beat in the sugar.
5. 5
   Add the egg and mix on low.
6. 6
   Turn off the mixer and slowly add half of the dry ingredients, and continue mixing on low until incorporated.
7. 7
   Add the other half, then the rum, coffee, and vanilla and mix until smooth.
8. 8
   Remove the dough and form it into a disk, then cover it with plastic wrap or put it in a sealable plastic bag.
9. 9
   Chill it for at least 30 minutes.
10. 10
    With a rolling pin, flatten the dough between two layers of parchment paper.
11. 11
    Sprinkle the dough with a little flour if it is sticking to the parchment paper.
12. 12
    Roll it into a disk about 1/2 inch thick and store in the refrigerator until ready to use.