In a large bowl, use an electric mixer to whip the heavy cream until stiff peaks form. This should take about 3-4 minutes.
In another bowl, combine the sweetened condensed milk, vanilla extract, and sea salt. Mix until fully blended.
Gently fold the whipped cream into the condensed milk mixture, ensuring not to deflate the whipped cream.
Once combined, carefully fold in the crushed graham crackers, mini marshmallows, and chocolate chips, dispersing them evenly throughout the mixture.
Pour the mixture into an airtight container and smooth the top with a spatula.
Cover the container and freeze for at least 4-6 hours, or until the ice cream is firm.
For serving, scoop the no-churn ice cream into bowls or cones, and top with additional crushed graham crackers, marshmallows, and a drizzle of chocolate if desired.
Notes
For an extra treat, top with additional crushed graham crackers, marshmallows, and chocolate drizzle when serving.