Slow Cooker Banana Nut Cake
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5 from 1 vote

Slow Cooker Banana Nut Cake

Prep Time25 mins
Cook Time2 hrs 30 mins
Total Time2 hrs 55 mins
Course: Dessert
Cuisine: American
Servings: 8
Calories: 659kcal
Author: Sarah Olson


  • 15.25 oz. yellow cake mix (I use Pillsbury)
  • 1/2 cup salted butter, melted
  • 2 bananas, mashed (this is about 1 cup measured)
  • 3/4 cup water
  • 1 tsp. vanilla extract
  • 3 large eggs
  • 1/2 cup chopped walnuts, divided

For the frosting

  • 8 oz. cream cheese (room temperature)
  • 1/2 cup salted butter (1 stick) (room temperature)
  • 1 cup powdered sugar
  • 1 tsp. vanilla
  • 1 Tbsp. milk

Slow Cooker Size:

  • 6 quart or larger


  • In a large bowl add the cake mix, melted butter, mashed bananas, water, vanilla extract, and eggs. Whisk until combined, do not worry if there is a few lumps left of cake mix, that is normal. Add about 3/4 of the nuts and stir again. (Saving some nuts for topping the frosting)
  • Spray the slow cooker very well with non-stick spray. Add the batter to the slow cooker and smooth out to a flat layer.
  • Cover and cook on HIGH for 2.5 hours, do not open the lid during the cooking time.
  • When the cooking time is done. Remove the insert out of the heating unit. Set the ceramic on a cooling rack. Let cake cool completely, this may take a few hours. To speed up the process after the ceramic isn't piping hot, you can put it in the fridge to cool.
  • When the cake is cooled, start making the frosting. You can use a stand mixer, or a handheld electric mixer.
  • Blend together the cream cheese and butter until combined. Add the powdered sugar, vanilla and milk. Blend until smooth, scrape down the sides of the bowl and blend again.
  • Spread the frosting on the cooled cake. Sprinkle with reserved nuts. Slice and serve.



Nutritional values are approximate, please use your own calculations if you require a special diet. The values below are based on 1/8 of the entire recipe.


Calories: 659kcal | Carbohydrates: 68g | Protein: 7g | Fat: 40g | Saturated Fat: 21g | Cholesterol: 153mg | Sodium: 713mg | Potassium: 225mg | Fiber: 1g | Sugar: 43g | Vitamin A: 1200IU | Vitamin C: 2.6mg | Calcium: 169mg | Iron: 1.8mg