Pumpkin Squares

These were requested by Jaime. Summer recently made these and received rave reviews!
Pumpkin Squares - LaDawn Cook

Crust: Mix and spread in a 9 x 13 pan
½ cup melted butter
1 egg
1 pkg. less 1 cup (save for topping) yellow cake mix

Filling: Mix well and pour over crust
3 ½ cups pumpkin
2 eggs
½ cup brown sugar
2/3 cup milk
2 ½ tsp. pumpkin pie spice* (see below)

Topping: Mix until crumbly and sprinkle over top.
1 cup cake mix
¼ cup sugar
¼ cup softened butter
¼ cup flour
1 tsp. cinnamon
1 cup nuts

Bake at 350 for 45-50 minutes. Serve topped with whipped cream.

*In place of pumpkin pie spice you can use: 1 tsp. cinnamon, 3/8 tsp. nutmeg, 3/8 tsp. cloves, ¾ tsp. ginger.