For the Banana Bread Batter:
3 mediumOverripe mashed bananas
1½ cupsAll-purpose flour
1 teaspoonBaking soda
¼ teaspoonSalt
½ cupUnsalted butter, melted and cooled
½ cup Brown sugar
¼ cupGranulated sugar
1Large egg
¼ cup Plain yoghurt
1 teaspoonVanilla extract
For the Garam Masala Swirl:
2 tablespoonsBrown sugar
1½ teaspoonsGaram masala
½ teaspoonGround cinnamon
1 tablespoonUnsalted butter, melted