Combine crumbs and melted butter and press into 9 x 13 inch pan. Cream cheese and powdered sugar until fluffy. Add cool whip to cheese mixture. Mix and spread over crumbs. Refrigerate.
Dissolve jello in hot water. Add frozen strawberries. When mixture begins to jell, pour over cheese layer. Refrigerate 4 hours or overnight. Top with whipped cream if desired.