Frozen Butter Brickle Dessert

2-1/2 c. crushed Rice Chex cereal

1 c. brown sugar

1/2 c. melted butter or margarine

1/4 tsp. butter flavoring

1 c. finely chopped cashew nuts

1 c. flaked coconut

1/2 tsp. coconut flavoring

1/2 gallon softened butter brickle

ice cream

Mix together all except ice cream. Press half of this mixture in a 9"x13" pan. Spread softened ice cream over top of first layer of crust. Sprinkle rest of mixture over the top. Freeze. Cut in squares to serve.