In a large bowl, add all of the ingredients for the crust and beat slowly (so you don’t get covered in flour!)
The mixture will be a crumbly dough. Grease a 9×13″ pan (can line with parchment paper also). Press the dough into the pan. As you add more and press into the pan, the dough will come together. *Reserve about 1/2-3/4 cup to top the bars with.*
Bake for 20 minutes.
While the crust is cooling, you can use the same mixing bowl to make the filling. Add all of the filling ingredients and beat.
Once the crust is done baking, let it cool for about 15 minutes, then spread the pumpkin filling on top evenly. Top with the reserved crust mixture.