First, line your springform cake pan with non-stick baking paper and brush the sides with melted butter or cooking spray.
To begin making your oat crust, combine all of the ingredients in the bowl of your food processor. Then, pulse the ingredients until you have a uniform fine crumb.
Place the crumb inside of your lined cake pan and press it tightly. You can also use the back of a flat measuring cup to level the crumb.
Then, place the crust inside the fridge and allow it to set until you are ready to fill it with cheesecake batter.
Place the cream cheese in a large mixing bowl. Then, beat it until it becomes light and fluffy. Add the pumpkin puree and mix it in well. Once you have a uniform mixture, add the white sugar and pumpkin pie spice mix.
Finally, stir in about 3 cups of Cool Whip whipped topping. Make sure that you have a completely smooth and lump-free batter.
Once your batter and crust are made, you can start assembling your cheesecake. To start, gently pour the cheesecake batter into the oat crust. Then, level it using an offset spatula or spoon.
If you are happy with the cheesecake, you can wrap the entire cake pan with plastic or saran wrap. Do not tilt the cheesecake so that the batter goes all lopsided.
Finally, allow the no-bake pumpkin cheesecake to set inside the fridge. We prefer keeping it overnight, but 6 to 8 hours will likely be enough.
Once your cheesecake has been set, you can remove it from the springform cake pan. First, take a heated thin knife blade and run it along the inside of the pan. This will loosen the cheesecake from the pan.
Then, unclasp the springform pan and completely remove the edges. Next, use an offset spatula or two to slide the cheesecake off the pan base and onto a cake stand or cake board.
The final step for this amazing cheesecake is of course the decoration part. You can use the remaining whipped topping to decorate the edges of the cake or create piped details.
Then, we like to top this cheesecake with chopped pecan nuts. Remember to toast the nuts to release their nutty flavor.