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+ servings
Easy chocolate bento cake design using chocolate frosting, chocolate shavings, and strawberries.
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5 from 1 vote

Bento Cake

These bento cakes (i.e. lunchbox or mini cakes) are perfect for special occasions: a lunchtime treat, birthdays, congratulations, or a simple “I’m thinking of you.”
Prep Time30 minutes
Cook Time33 minutes
Total Time1 hour 3 minutes
Servings: 3 cakes

Ingredients

Cake

  • Cooking spray/butter stick and flour to prevent cake sticking to the pan.
  • Cake mix (be sure it lists a 9x13 pan)
  • Ingredients on the cake mix box

Frosting & Decor

  • 1 cup salted butter, softened
  • 4 cups powdered sugar
  • 3 teaspoons vanilla extract
  • 1 cup unsweetened cocoa powder
  • 1-2 tablespoons milk

Instructions

Prepping Cakes

  • Preheat the oven to 350°F.
  • Add a piece of parchment paper to the bottom of a 9x13 baking dish. Grease the sides with a stick of butter or cooking spray and flour them.
  • Prepare and bake the cake according to the package instructions.
  • Once completely cool, take a butter knife and loosen the edges of the pan. Flip the cake over to remove it from the pan.

Prepping Frosting

  • Beat butter on medium in a large mixing bowl for a couple minutes or until soft and creamy.
  • Gradually beat in the powdered sugar on low speed. Stop on occasion to scrape down the bowl.
  • Continuing to beat over low, add in cocoa power and vanilla. Add milk one teaspoon at a time until desired consistency of frosting is met.
  • Increase the speed to medium and beat a couple minutes until light/fluffy. Refrigerate until ready to serve.

Assembling Cakes

  • Using a circle biscuit/cake cutter, cut out six 4-inch circles of cake and set side. Make sure to select three cakes for the bottom layers that have a flat top of slice a thin layer off them to flatten them.
  • Cut out three square (6-8-inch) pieces of parchment papers to place the cakes on and top each with a small circle of frosting to help the cake stick.
  • Add the first cake circle on a parchment square. Frost the cake. Add another cake layer and then frost the entire cake. Scrape smooth with a cake icing knife. Repeat twice to make two more cakes.
  • Freeze cakes for ten minutes to firm up the frosting. Then add one more layer of frosting on each. Line each bento box with a clean square of parchment paper. Remove cakes from old parchment paper and add them into the bento box on top of the new parchment paper. Decorate as desired.

Notes

*You can substitute can frosting if desired to save additional time.