Maple Nut Cake W/ Sour Cream Filling

1/2 cup margarine
2 1/2 cups flour
1/4 tsp. salt
1 cup chopped walnuts
2 cups brown sugar (firmly packed)
1 cup sweetened condensed milk
4 tsp. baking powder
1 tsp. maple flovoring

Put all ingredients except walnuts in mixing bowl and beat until creamy. Add and fold in walnuts. Bake in a 9 inch greased cake pan @ 350 degrees about 30 min.

Sour Cream Filling

2 cups brown sugar
2 cups sour cream
1/2 tsp. maple flavoring

In a saucepan, cook sugar and cream on high heat, stirring constantly, until it forms a soft ball. Remove from heat. Add maple flavor and beat until soft and creamy.Ice the cake.