Preheat the oven to 350
In a large bowl whisk together the eggs, pumpkin puree and evaporated milk until well mixed.
Add in the vanilla extract, pumpkin pie spice, cinnamon, brown sugar and pumpkin puree. Mix until all of the ingredients are well incorporated.
Pour the pumpkin pie filling mixture into the graham cracker pie crust.
Place the pie in the oven and bake for 45-55 minutes. The pie is done baking when a knife inserted into the center of the pie comes out clean.
Remove the pie from the oven and place on a cooling rack. Let the pie cool completely before serving.