In a medium-sized mixing bowl, combine pudding mix, heavy cream, milk, sour cream or greek yogurt, and vanilla. Whisk for two minutes or until everything is completely combined and smooth.
Evenly spread mixture into the bottom of the baked and cooled pie crust.
Spread a thin layer of whipped topping over the pudding layer.
Using the chocolate syrup, make a back and forth pattern across the pie, starting at one end and going to the other.
Next, drag a knife through the syrup in one direction and then the other every inch or so to get the desired zebra-esk pattern.
Recipe by Real Life Dinner at https://reallifedinner.com/easy-eclair-pie-recipe/