Sweet Potato Casserole

5 large sweet potatoes
3 large eggs
2/3 c. granulated sugar
2/3 c. butter
1/3 c. heavy whipping cream
1 tsp. vanilla
1/2 tsp. nutmeg
1/2 tsp. allspice
1 c. packed brown sugar
1/2 c. flour
1 c. finely chopped pecans
1/3 c. butter

Cook sweet potatoes covered with water in large kettle until tender. Peel and mash in large bowl. Add eggs, 2/3 cup sugar, 2/3 cup butter, whipping cream, vanilla, nutmeg and allspice. Mix together with sweet potatoes and pour into greased two-quart casserole. Top with mixture of brown sugar, flour, pecans and butter. Bake at 350° for 60 minutes.