Marble Cheesecake

Yield:	1 Cake
Categories:	Cakes, Desserts

3	pk	Cream cheese; softened (8 oz. each)
1	c	Sugar; divided
1/2	c	Dairy sour cream
2 1/2	ts	Vanilla extract; divided
3	tb	All-purpose flour
3		Eggs
1/4	c	Hershey's Cocoa
1	tb	Vegetable oil
		Chocolate Crumb Crust (recipe follows)