Ingredients:

  • 1.5 cups mashed overripe bananas (approx. 3-4 medium bananas)
  • 0.5 cup unsalted butter, softened
  • 1 cup packed dark brown sugar
  • 1 large egg, room temperature
  • 1 tbsp pure vanilla extract
  • 1 tbsp sour cream or full-fat Greek yogurt
  • 1.5 cups all-purpose flour
  • 1 tsp baking soda
  • 0.5 tsp fine sea salt
  • 1 tsp ground cinnamon

Instructions:

  1. Preheat and Prep: Set your oven to 350°F (175°C). Grease your pan thoroughly. Note: This ensures the batter hits a hot environment immediately for maximum oven spring.
  2. Cream the Base: Combine 0.5 cup softened butter and 1 cup dark brown sugar. Beat for 3 minutes until pale, fluffy, and significantly increased in volume.
  3. Emulsify the Liquids: Add the 1 egg, 1 tbsp vanilla, and 1 tbsp sour cream. Beat until the mixture looks like smooth buttercream.
  4. Process the Fruit: Mash 1.5 cups of bananas (3-4 medium) in a separate bowl. Fold them into the wet mixture using a spatula.
  5. Dry Ingredient Integration: Whisk 1.5 cups flour, 1 tsp baking soda, 0.5 tsp salt, and 1 tsp cinnamon. Note: Whisking breaks up flour clumps and aerates the mix.
  6. The Gentle Fold: Gradually add dry ingredients to wet. Fold with a spatula until no white streaks remain. Stop immediately to avoid gluten development.
  7. The Pour: Transfer the batter into the pan. Smooth the top with the back of a spoon.
  8. The Long Bake: Bake for 60 minutes. Check at 50 minutes by inserting a toothpick; it should come out with just a few moist crumbs.
  9. The Cooling Phase: Rest in the pan for 10 minutes, then move to a wire rack. Note: Cooling on the rack prevents sweating and keeps the crust crisp. > Chef's Tip: For a deeper flavor profile, brown your butter in a saucepan first, then let it solidify back to a soft state before creaming. It adds a nutty, toasted dimension that decodes the secret ingredient in many famous bakeries.