How ripe should the bananas be?
Use very ripe bananas with plenty of brown spots—they're sweeter and mash more easily, giving the cake better flavor and moisture.
Can I make this cake ahead?
Yes. Bake the layers a day ahead, wrap unfrosted, and store at room temperature. Frost and assemble the day you serve it for best texture.
How do I create the cinnamon swirl?
Mix softened butter, brown sugar, and cinnamon, then spread between the two cake layers before frosting. This creates the gooey swirl effect.
What can I substitute for Greek yogurt?
Use sour cream or regular plain yogurt in equal amounts—both add moisture and slight tang while keeping the crumb tender.
How do I know when the cake is done baking?
A toothpick inserted in the center should come out with a few moist crumbs. The cake should spring back lightly when touched and edges should pull away from the pan.