Marbled Tarts

Directions

1. 1
   Preheat oven to 325 degrees F.
2. 2
   Combine flour, 1/3 cup sugar, cocoa and salt. Cut in butter until mixture is crumbly.
3. 3
   Sprinkle with cold water, 1 Tbsp at a time, mixing gently until all the mixture is moistened.
4. 4
   Form this mixture into a ball. Shape dough into twenty-four 1-inch balls and press onto the bottom and up the sides of ungreased 1 3/4-inch muffin cups.
5. 5
   In a small bowl beat cream cheese and 3 tablespoons sugar until fluffy. Separate the egg and beat in the egg yolk, sour cream and vanilla.
6. 6
   Divide the cream cheese mixture evenly among the muffin cups. Top each with about 1/2 tsp of the chocolate chips.
7. 7
   Bake for 5 minutes. Remove from oven.
8. 8
   With a knife or chopstick, slightly swirl chocolate into mixture just to marble. Return to the oven and bake for 20-25 minutes more.
9. 9
   Cool slightly in pan. Remove and cool on a rack.