Preheat oven to 350°

In a medium size mixing bowl, combine flour, brown sugar, and pecans. Add butter and mix together until crumbly.

Press mixture into a prepared 8x8 baking pan. Bake 15 minutes, until lightly browned. Remove from oven and allow to cool on a wire rack.

To the mixing bowl, add cream cheese and sugar. Beat with a hand mixer on Medium speed until it reaches a frosting-like consistency.

Add the pumpkin, eggs, vanilla extract, cinnamon, and allspice. Continue mixing until fully combined.

Pour over crust and bake 45-50 minutes, or until set. Remove from oven and cool completely before refrigerating at least 2 hours.

Cut into individual portions. Press extra pecan chips into the sides, top with whipped cream, and serve chilled.