Easy Banana Sheet Cake

Moist, fluffy, and bursting with banana flavor, this Easy Banana Sheet Cake is the ultimate crowd-pleasing dessert that comes together in just 15 minutes of prep! Perfect for using up overripe bananas, this simple recipe combines pantry staples like all-purpose flour, butter, and buttermilk to create a tender crumb that bakes beautifully in a single 9x13 pan. With the added richness of brown sugar and the warm aroma of vanilla, every bite is pure comfort. Ideal for casual gatherings or weeknight treats, this banana sheet cake is easily customizable—pair it with cream cheese frosting, a drizzle of caramel, or enjoy it plain for a lightly sweet snack. Ready in under an hour and serving a generous 12 portions, this one-bowl wonder is perfect for busy bakers seeking big flavor with minimal effort.

Nutriscore Rating: 49/100

Prep Time:15 mins

Cook Time:30 mins

Total Time:45 mins

Servings: 12

Ingredients

• 3 large ripe bananas
• 113 grams unsalted butter
• 200 grams granulated sugar
• 100 grams brown sugar
• 2 large eggs
• 2 teaspoons vanilla extract
• 250 grams all-purpose flour
• 2 teaspoons baking powder
• 1 teaspoon baking soda
• 0.5 teaspoon salt
• 120 milliliters buttermilk

Directions

Step 1

Preheat your oven to 350°F (175°C) and grease a 9x13 inch sheet pan or line it with parchment paper.

Step 2

In a large mixing bowl, mash the ripe bananas until smooth. Set aside.

Step 3

Melt the butter and allow it to cool slightly. Then, add the melted butter, granulated sugar, and brown sugar to the mashed bananas, and mix until well combined.

Step 4

Beat in the eggs one at a time, followed by the vanilla extract.

Step 5

In a separate bowl, whisk together the all-purpose flour, baking powder, baking soda, and salt.

Step 6

Gradually add the dry ingredients to the wet ingredients in batches, alternating with the buttermilk. Start and end with the dry ingredients, mixing until just combined. Do not overmix.

Step 7

Pour the batter into the prepared sheet pan and spread it out evenly.

Step 8

Bake the cake in the preheated oven for 28-32 minutes, or until a toothpick inserted into the center comes out clean.

Step 9

Remove the cake from the oven and allow it to cool completely in the pan before slicing and serving.

Step 10

Optional: Top with cream cheese frosting or a dusting of powdered sugar for added sweetness.

Nutrition Facts

Serving size	1320 grams (1320.0g)

Amount per serving	% Daily Value*
Calories	3492

Total Fat 114.00g	146%
Saturated Fat 62.70g	314%
Polyunsaturated Fat 0.20g
Cholesterol 636mg	212%
Sodium 3661mg	159%
Total Carbohydrate 594.20g	216%
Dietary Fiber 17.50g	63%
Total Sugars 354.80g
Protein 47.70g	95%

Vitamin D 146IU	732%
Calcium 362mg	28%
Iron 15mg	84%
Potassium 2207mg	47%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 28.6%

Protein: 5.3%

Carbs: 66.1%