Freshly whipped cream, for serving
3 Super ripe bananas, mashed
1 cup Sliced strawberries, plus more for serving
1 Egg plus egg yolk
1 tsp. Vanilla extract
1/4 cup Buttermilk
1 cup Sugar
1/4 tsp. Kosher salt
1 tsp. Baking soda
1 1/2 cups All-purpose flour, plus for flouring pan
1/2 cup Softened butter
1/2 cup Melted butter