Chocolate Orange Marble Cheesecake

• ounces cream cheese, softened↗24 ounces
• cup light brown sugar, firmly packed↗3⁄4 cup
• cup granulated sugar↗1⁄4 cup
• eggs↗4
• cups sour cream↗4 cups
• tablespoon orange rind, grated↗1 tablespoon
• ounces squares semisweet chocolate, melted and cooled↗6 ounces
• Crust
• cup graham cracker crumbs↗1⁄2 cup
• tablespoon granulated sugar↗1 tablespoon
• tablespoons butter or 2 tablespoons margarine, melted↗2 tablespoons
• ounce unsweetened chocolate square, melted↗1 ounce
• orange slice (optional)
• chocolate leaves (optional)

Step-by-step instructions

1. 1

   Preheat oven to 350F and lightly butter 8" x 3" deep springform pan.

2. 2

   Combine crumbs, sugar, butter and chocolate in a small bowl.

3. 3

   Press into bottom of prepared springform pan; refrigerate.

4. 4

   Beat cream cheese in a large bowl until smooth.

5. 5

   Gradually beat in sugars until well mixed.

6. 6

   Beat in eggs, one at a time, until fluffy.

7. 7

   Beat in sour cream and grated orange rind; reserve 3 cups.

8. 8

   Beat cooled semisweet chocolate into remaining cream cheese mixture until well mixed.

9. 9

   Spoon one cup of the reserved plain cheese mixture over crust in springform pan.

10. 10

    Spoon half the chocolate-cheese mixture in for separate mounds over the plain layer.

11. 11

    Cover with another cup of plain cheese mixture; repeat layers.

12. 12

    Cut through batter with zigzag motion to marbelize.

13. 13

    Bake in preheated oven for an hour; turn heat off and leave in oven for an additional hour.

14. 14

    Remove from oven and cool on rack; refrigerate overnight.

15. 15

    Remove from pan and decorate with orange slices and chocolate leaves, if desired.