Preheat oven to 325 degrees Fahrenheit.
If using premade sugar cookie dough, open the package and break up the roll a bit and allow the dough to warm up to be more workable.
Roll the dough into a smooth ball then sprinkle flour onto a large baking sheet lined with parchment paper and use a rolling pin to flatten out the dough.
Begin creating a triangle shape by using the palm of your hands to pat the outsides of the dough inwards. You can stop here and just make a large triangle shape like a christmas tree or you can create 3 layers of branches by pinching in a section close to the top and the center of the dough. It takes some time to shape, so work slowly and use flour as you go so the dough doesn’t become too sticky.
Make sure there are no tears or rips in the cookie dough and that the cookie is rolled out to about ½ inch all the way throughout the cookie.
Place the baking sheet in the oven and bake for 18-20 minutes or until set.
Remove the cookie from the oven and allow it to cool on the pan completely then carefully transfer it to a cookie rack.
While the Christmas tree cookie is cooling, make the whipped cream.
In a large bowl, beat the cold heavy cream until soft peaks form, then add the vanilla, powdered sugar and green food coloring and whip until stiff.
Use a spatula to frost the cooled cookie with the green whipped cream.
Place the fruit on the whipped topping in a fun pattern. Serve chilled.