Preheat oven to 350F. Line an 8×8 baking dish with parchment paper.
First make the crust and crumb topping by combining all of the ingredients for the crust in a large mixing bowl. Mix well until fully combined.
Spoon 3/4 of the mixture in the baking dish, pressing down with your hands so it’s evenly distributed. Set the remaining mixture aside to use as the crumb topping later on.
Next make the pumpkin pie filling by combining all of the ingredients for the filling in a separate bowl, mixing well.
Pour the pumpkin pie filling on top of the crust.
Place in the oven and bake for 30 minutes, then remove from the oven and sprinkle the remaining crust mixture on top of the pumpkin pie filling. Place back in the oven and bake for an additional 25 minutes.
Remove from the oven and allow to cool in the fridge for at least 4 hours before slicing and serving.