Stir together the whipped topping and half of the chocolate syrup and then place mixture in the freezer to firm up while you prep the rest of your dessert.
In a very small microwave safe dish (like a ramekin), combine cake mix and yogurt and stir until smooth. Microwave for 1 minute and allow to cool for 5 minutes. Once the cake has cooled spoon chocolate topping mix over the top.
Finally drizzle the remaining chocolate syrup on top and Enjoy.