Flaky sea salt, for garnish
1/2 cup Caramel, plus more for drizzling
1 Sliced ripe bananas
3 Mashed ripe bananas
1 Large egg plus egg yolk
1 tsp. Pure vanilla extract
1/4 cup Buttermilk
3/4 cup Granulated sugar
1/4 tsp. Kosher salt
1 tsp. Baking soda
1 cup All-purpose flour, plus more for pan
1/2 cup Butter, melted, plus more for pan