1 (18 1/2 oz.) box yellow cake mix
1/2 c. butter, melted
4 eggs
3 c. pumpkin
1 c. sugar, divided
1/2 c. firmly packed light brown sugar
2/3 c. evaporated milk
1 1/2 tsp. cinnamon
1/2 c. chopped walnuts
1/4 c. butter, softened

Preheat oven to 350 degrees. Grease and flour a 9x13 inch baking pan.

Remove 1 cup of the cake mix; reserve. In small bowl, lightly beat 1 egg. In large bowl, stir together remaining cake mix, melted butter and the beaten egg. Press into prepared pan.

In large bowl, lightly beat remaining 3 eggs. Stir in pumpkin, 1/2 cup of sugar, brown sugar, evaporated milk and cinnamon. Pour over cake mixture in pan.

To the 1 cup reserved cake mix, add remaining 1/2 cup sugar, walnuts and softened butter; mix until crumbly. Sprinkle over pumpkin mixture. Bake 50-60 minutes. Serve warm or cool.