4.6 from 114 votes
Banana Cake with Cake Mix
This banana cake uses boxed yellow cake mix combined with ripe mashed bananas, eggs, oil, and vanilla extract to create a moist, soft crumb. It's topped with a rich chocolate butter frosting made from butter, cocoa powder, powdered sugar, vanilla, and cream for smooth spreadability. Baking in a 9×13 pan produces a simple sheet cake suitable for casual desserts or gatherings.
Prep Time
15 mins
Cook Time
25 mins
Total Time
1 hr
Servings:
12
slices
Calories:
614 kcal
Course:
Dessert
Cuisine:
American
Ingredients
Cake
- 1 yellow cake mix 15.25 ounce, boxed
- 3 banana peeled and mashed, ripe
- 1/2 cup vegetable oil
- 2 egg large
- 1 teaspoon vanilla extract
Frosting
- 1 cup butter room temperature
- 1/2 cup cocoa powder unsweetened
- 4 cups powdered sugar
- 1 teaspoon vanilla extract
- 4 – 5 tablespoons heavy cream
Instructions
Cake
- Preheat oven to 350 degrees. Spray a 9×13 baking pan with nonstick baking spray.
- Add the peeled bananas to a large bowl and mash with a fork.
- Add oil (or 1 stick of butter melted), eggs, and vanilla. Using a whisk, mix until combined.
- Add in the yellow cake mix until whisk until all ingredients are blended together.
- Pour the batter in the prepared pan. Spread the batter evenly in the pan.
- Place in the oven and bake for 25 to 30 minutes or until a toothpick inserted in the middle comes out clean or with moist crumbs.
- Cool completely before frosting.
Cup of Yum
Frosting
- In a large mixing bowl, add in the butter and cocoa powder. Beat with a hand mixer until creamy.
- Add in the powdered sugar, vanilla, and heavy cream and continue to beat until combined. You may add additional heavy cream 1 tablespoon at a time to get the desired consistency of frosting.
- Spread the frosting on top of the cake with an offset spatula.
- Cut and serve.
Nutrition Information
Calories
614kcal
(31%)
Carbohydrates
85g
(28%)
Protein
4g
(8%)
Fat
31g
(48%)
Saturated Fat
21g
(105%)
Cholesterol
83mg
(28%)
Sodium
465mg
(19%)
Potassium
204mg
(4%)
Fiber
2g
(8%)
Sugar
62g
(124%)
Vitamin A
697IU
(14%)
Vitamin C
3mg
(3%)
Calcium
113mg
(11%)
Iron
2mg
(11%)
Nutrition Facts
Serving: 12 slices
Amount Per Serving
Calories 614
% Daily Value*
| Calories | 614kcal | 31% |
| Carbohydrates | 85g | 28% |
| Protein | 4g | 8% |
| Fat | 31g | 48% |
| Saturated Fat | 21g | 105% |
| Cholesterol | 83mg | 28% |
| Sodium | 465mg | 19% |
| Potassium | 204mg | 4% |
| Fiber | 2g | 8% |
| Sugar | 62g | 124% |
| Vitamin A | 697IU | 14% |
| Vitamin C | 3mg | 3% |
| Calcium | 113mg | 11% |
| Iron | 2mg | 11% |
* Percent Daily Values are based on a 2,000 calorie diet.