Maple syrup, for serving
Semisweet chocolate chips
3 Ripe bananas, mashed with a fork
1 tsp. Pure vanilla extract
1/4 cup Sour cream
1 Large egg yolk
1 Large egg
1 cup Sugar
1/2 cup Melted butter
1/2 tsp. Kosher salt
1 tsp. Baking soda
2 cups All-purpose flour
Cooking spray