1In small bowl, mix cracker crumbs, Bisquick mix and sugar. Stir in butter until moistened. Press in bottom of ungreased 8-inch square microwavable dish. Microwave uncovered on High 1 minute 30 seconds to 3 minutes, rotating dish 1/2 turn every minute, until crust bubbles up slightly and then begins to flatten. Cool 10 minutes on cooling rack.
2Peel and slice bananas; dip into lemon juice. Arrange on cooled crust.
3In medium bowl, beat milk and pudding mix (dry) with wire whisk or electric mixer on low speed until smooth. Stir in marshmallows. Spread mixture over bananas. Sprinkle with chocolate chips. Refrigerate up to 1 hour before serving. Store covered in refrigerator.