Halve the banana lengthwise and crush the toasted hazelnuts.

1. In a medium saucepan, combine heavy cream, butter, granulated sugar, and brown sugar.
2. Bring to a light simmer over medium heat, whisking until melted and combined.
3. Simmer for 1 minute, then whisk in dark chocolate until melted.
4. Remove from heat, whisk in cocoa powder, and return to low heat, stirring for 30 seconds until thick and glossy.
5. Remove from heat and whisk in vanilla extract.
6. Strain if desired.

1. In a long serving bowl, place vanilla ice cream scoops in the center.
2. Arrange banana slices on either side.
3. Drizzle with fudge sauce, sprinkle with hazelnuts, and add whipped cream.
4. Top with cherries and serve immediately.