1/2 gal. slightly softened ice cream
2 c. Rice Chex, crushed
1 c. flaked coconut
1 c. chopped walnuts
1/3 c. melted butter
2/3 c. brown sugar

Combine above ingredients, except ice cream. Put 2/3 in bottom of 9x13 inch pan. Cover with slightly softened ice cream. Put rest of crumb mixture on top. Freeze.