Fully loaded with creamy fudge, salty pretzels, crunchy toffee, and chewy, bittersweet candied lemon peel, this over-the-top sundae gets drenched in homemade caramel sauce for a grown-up take on a nostalgic childhood treat served at chef Dan Kluger's Loring Place in New York City. Mix up an extra-large batch for ready-made sundaes all summer long.
Scoop ice cream into a large bowl; stir ice cream until slightly softened, about 2 minutes. Stir in fudge, pretzels, toffee candy bar, and lemon peel until evenly combined. Cover and freeze until firm, at least 3 hours or up to 12 hours.