The BEST Banana Bars

by Bet49266041
20 Servings
40 min

Use those over-ripe bananas and make this soft banana sheet cake with cream cheese frosting! These Banana Bars are perfect to feed a crowd! Make this delicious cake and take it to your next BBQ, picnic, family party or potluck!

The BEST Banana Bars are made in a half sheet pan. Get the ones I use and love by clicking here

(As an Amazon Associate and member of other affiliate programs, I earn from qualifying purchases.)

Soft banana cake with cream cheese frosting is the perfect way to use those ripe bananas!

Recipe details
  • 20  Servings
  • Prep time: 15 Minutes Cook time: 25 Minutes Total time: 40 min
Show Nutrition Info
Hide Nutrition Info
Banana Bars Cake
  • 1/2 cup butter, softened
  • 1 1/3 cups white sugar
  • 2 large eggs
  • 1 cup sour cream
  • 1 1/2 teaspoon vanilla extract
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 2 cups all purpose flour
  • 3 medium ripe bananas, mashed with no lumps
Cream Cheese Frosting
  • 8 oz. cream cheese, softened
  • 1/2 cup butter, softened
  • 1 1/2 teaspoons vanilla extract
  • 2 to 3 cups powdered sugar (add as much or as little as you like)
Banana Bars Cake
Preheat oven to 425 degrees. Grease your half sheet pan.
In a mixer, using the paddle attachment, cream the sugar and butter together until smooth. * A hand mixer works as well, or you can mix it by hand.
Add in your eggs, sour cream and vanilla. Mix well. Add in the ripe mashed bananas and mix well.
Add in your baking soda, salt and flour. Mix well until the ingredients are combined.
Pour the cake batter into your greased half sheet pan.
Bake your cake for 20-25 minutes, until the edges start to brown and pull away from the corners of the pan. You will know it is done when you poke the center of the cake with a toothpick and it comes out clean.
Remove the cake from the oven and let it cool. Make your frosting as it cools.
Cream Cheese Frosting
In a stand mixer with the whisk attachment (or you may use a hand mixer or mix it by hand), add all of the frosting ingredients and mix it until it is smooth. You can add more or less powdered sugar to your liking, to reach your desired sweetness and thickness. TIP: Make sure your cream cheese and butter are fully softened or your frosting will be lumpy (it will still taste yummy but will be lumpy).
Frost the banana bars once they are cooled. Cut into pieces and enjoy.
  • I use a half sheet pan for this recipe that measures about 18x13 inches on the outside of the pan and is about 1 inch high.
Want more details about this and other recipes? Check out more here!
  • Dol24756578 Dol24756578 on Oct 03, 2023

    What is a half sheet pan?

  • Bet49266041 Bet49266041 on Oct 03, 2023

    It’s a bigger pan than a normal flat baking sheet… it has rimmed sides and measures about 13x18 inches…. A jelly roll pan is a little smaller and measures at about 10x15 inches…. Either will work… if you’re using the jelly roll pan just don’t add all of the batter or it may bake over the edges and make a mess in the oven!!!