Frozen S'mores Cake

Line bottom and sides of a 9-by-5-inch loaf pan with parchment paper, allowing 2 to 3 inches to extend over sides.

Beat marshmallow crème and 1 cup whipping cream with an electric mixer until stiff peaks form, about 2 minutes.

Place 3 graham cracker sheets in a single layer in bottom of prepared pan, breaking crackers to fit. Top with 1 pint gelato, spreading to sides of pan. Top with 3 more graham cracker sheets in a single layer. Top with whipped cream mixture in an even layer, spreading to sides of pan. Top with 3 more graham cracker sheets and remaining 1 pint gelato, spreading to sides of pan. Top with remaining 3 graham cracker sheets. Cover with plastic wrap and freeze until very firm, about 8 hours.

Line a baking sheet with parchment paper and spray with cooking spray. Spread marshmallows in an even layer on baking sheet. Freeze for 15 minutes.

Preheat broiler with rack about 6 inches from heat. Broil marshmallows until tops are golden brown, about 1½ minutes. Remove from oven and let cool on baking sheet for 5 minutes. Return baking sheet to freezer; freeze until marshmallows are firm, about 15 minutes.

Place chocolate chips and remaining ¼ cup whipping cream in a small microwave-safe bowl. Microwave on high, stirring every 30 seconds, until cream is hot, about 1 minute. Let stand for 2 minutes; stir until smooth.

Remove cake from freezer. Using parchment as handles, lift cake and invert onto a serving platter. Top with frozen marshmallows and drizzle with chocolate mixture. Serve immediately, or cover with plastic wrap and freeze until ready to serve.