SONIC America€™s Drive-In is the nation€™s largest chain of drive-in restaurants! Serves 3,500+ drive-ins serving ~3M customers everyday. SONIC has an award-winning menu including signature Cherry Limeades and Shakes. Enjoy this simple, easy to make Vanilla Shake pudding at home! SONIC Vanilla Shake Pudding. Fun and easy to make! Enjoy the taste of SONIC Vanilla shakes at home.