1/2 c. butter
2 c. vanilla wafer crumbs
1 can sweetened condensed milk
1/2 c. lemon juice

Put butter in baking dish. Microwave on high for 45 seconds. Stir in wafer crumbs; blend and remove 1/2 cup of mixture; set aside. Press rest of mixture in bottom of pan.

Beat lemon juice and milk together. Spread over crumbs. Sprinkle remaining crumbs on top. Microwave on medium-high for 10 minutes.