Start with ripe bananas, preferably with brown spots, for maximum sweetness and flavor. Mashed bananas add moisture and natural sweetness to the cake.
Enhance the nutty flavor of the cake by toasting the walnuts before adding them to the batter. Toasting brings out the oils in the nuts, intensifying their flavor.
Create a decadent rum glaze by combining rum, sugar, and butter in a saucepan. Simmer until thickened, then brush the glaze over the warm cake for a boozy and flavorful finish.
Cream butter and sugar together until light and fluffy to create a tender and moist cake crumb. Creaming incorporates air into the batter, resulting in a lighter texture.
Use high-quality vanilla extract to enhance the flavor profile of the cake. Pure vanilla extract adds depth and complexity to the cake's flavor, balancing the sweetness.
Incorporate buttermilk or yogurt into the batter to add richness and tanginess. These dairy ingredients also help tenderize the cake crumb, resulting.
Use all-purpose flour for the cake batter to provide structure and stability. Be careful not to overmix the batter to avoid developing gluten, which can result in a dense cake.