Melted Coconut Oil (Best Option)
1:1 by volume (e.g., 1/2 cup melted coconut oil per 1/2 cup butter)Coconut oil is high in saturated fats, similar to butter, which helps replicate the tender, moist texture in banana bread by coating flour proteins and inhibiting gluten development. Its solid state at room temperature also helps maintain structure during baking.
To ensure success, use refined coconut oil if you want a neutral flavor; unrefined will add a mild coconut taste. Melt the oil before measuring to match butter’s liquid state in the recipe.
Compared to butter, coconut oil can produce a slightly denser crumb and a subtle coconut flavor, which many find complementary to banana bread’s profile.