Crackers for serving Cook onion in butter till limp. Drain shrimp; place in a bowl with enough water to cover with 3 ice cubes and the lemon juice. Let sit 5 minutes; discard ice cubes and drain well. Mash up shrimp. Cut cream cheese into hunks; blend in pan with butter and onions. Stir in crushed shrimp, horseradish, Tabasco, and woo sauce; mix well. Heat thoroughly. Remove from heat and serve with crackers.