1 c. chocolate wafer crumbs
1/4 c. butter, softened
1 pkg. (3 oz.) lime flavored gelatin
1/2 c. boiling water
1 pt. vanilla or pistachio ice cream, softened

Combine crumbs and softened butter. Press against bottom and sides of an 8 inch pie plate. Empty gelatin into a bowl; add boiling water and stir to dissolve. Stir in ice cream a few spoonfuls at a time, beating vigorously as it thickens. Pile mixture into the lined pie plate and chill until serving time. Place shamrocks on pie.