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How to Make Costco Banana Bread Recipe

Costco Banana Bread Recipe

This luscious Costco banana bread is a must-go for any special occasion or just for a cozy night! The secret to this recipe lies in the use of Costco’s extra-large, organic bananas.
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Author: Lori Walker, MS, RD
Course: Appetizer
Prep Time: 15 minutes
Cook Time: 1 hour 5 minutes
Rest time: 15 minutes
Total Time: 1 hour 35 minutes
Servings: 3
Calories: 235kcal


  • 1/2 cup chopped pecans providing a delightful crunch and a nutty depth of flavor, adding texture and richness to each bite. The pecans also offer a beautiful visual appeal to the finished baked goods.
  • 1/4 cup granulated sugar adding a delightful sweetness that caramelizes beautifully during baking, creating a golden and irresistible crust.
  • 1/2 cup buttermilk or whole milk providing a tangy and creamy element that tenderizes the crumb and adds a subtle richness to the batter.
  • 1 large egg beaten, acting as a binding agent and adding moisture to the batter, resulting in a moist and tender crumb.
  • 1/2 teaspoon pure vanilla extract infusing the batter with its heavenly aroma and adding a warm and inviting flavor that enhances the sweetness of the other ingredients.
  • 1/4 teaspoon salt enhancing the flavors of the other ingredients and balancing the sweetness, creating a well-rounded and harmonious taste.
  • 3/4 cup bananas, mashed about 1-2 ripe bananas, introducing natural sweetness and moisture to the recipe, resulting in a moist and flavorful outcome.
  • 1 cup all-purpose flour serving as the foundation of the batter, creating a light and tender texture that is perfect for baked goods.
  • 2 tablespoons light brown sugar packed, contributing a subtle caramel-like flavor and a hint of molasses, deepening the overall taste profile.
  • 1/2 teaspoon baking soda acting as a leavening agent, causing the batter to rise and creating a light and airy texture in the final product.
  • 1/4 cup unsalted butter softened, bringing velvety richness to the batter and lending a luxurious mouthfeel to the final baked goods.


  • Preheat Oven To 350°F (175°C) And Grease Loaf Pan.
  • Cream Butter, Sugar, And Brown Sugar In A Large Bowl.
  • Incorporate Eggs One At A Time, Then Add Vanilla, Buttermilk, And Bananas.
  • In Another Bowl, Combine Flour, Baking Soda, And Salt. Gradually Mix Into Banana Mixture.
  • Gently Fold In Pecans. Transfer The Batter To The Pan, Smoothing The Top.
  • Bake For 60-70 Minutes Or Until A Toothpick Inserted Comes Out Clean.
  • Cool Bread In Pan For 10 Minutes, Then Move To A Wire Rack For Complete Cooling.


  • If you would like a sweeter banana bread, feel free to add an extra tablespoon of sugar.
  • For a richer flavor and darker color, try using dark brown sugar instead of light brown sugar.
  • If desired, you can substitute the pecans with other nuts such as walnuts or almonds.
Keyword: Costco Banana Bread Recipe