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Classic Lunch Box Cake – A Mini Delight for Any Occasion


  • Author: Camila
  • Total Time: 35 minutes
  • Yield: 1 small cake (4-inch or 6-inch round) 1x

Description

A lunch box cake is a miniature, personalized cake that’s perfect for school lunches, work treats, or giftable desserts. Inspired by the popular bento cakes from South Korea, these cakes are compact, beautifully decorated, and easy to transport.

Unlike full-sized cakes, lunch box cakes are portion-controlled, making them ideal for small celebrations or everyday indulgence. This classic vanilla version is soft, fluffy, and pairs perfectly with a variety of fillings and frostings.


Ingredients

Scale

 

For the Cake:

  • 1 ½ cups all-purpose flour (or cake flour for a lighter texture)
  • ¾ cup sugar
  • ½ cup unsalted butter, softened
  • 2 large eggs
  • ½ cup milk (dairy or non-dairy alternative)
  • 1 tsp vanilla extract
  • 1 tsp baking powder
  • ¼ tsp salt

For the Frosting (Vanilla Buttercream):

  • ½ cup unsalted butter, softened
  • 2 cups powdered sugar
  • 1 tbsp milk (adjust for consistency)
  • 1 tsp vanilla extract
  • ¼ tsp salt

Optional Fillings:

  • 2 tbsp strawberry jam (for a fruity touch)
  • 2 tbsp chocolate ganache (for a rich filling)

Instructions

Step 1: Prepare the Cake Batter

  1. Preheat the oven to 350°F (175°C) and grease a 4-inch or 6-inch round pan.
  2. In a bowl, whisk together flour, baking powder, and salt. Set aside.
  3. In a separate bowl, beat butter and sugar until light and fluffy (about 2 minutes).
  4. Add eggs one at a time, mixing well after each addition.
  5. Slowly add the dry ingredients, alternating with milk. Stir in vanilla extract until fully combined.
  6. Pour batter into the prepared cake pan and smooth the top.

📌 Pro Tip: Tap the pan gently on the counter to remove air bubbles for an even texture.


Step 2: Bake the Cake

  1. Place the cake pan in the preheated oven and bake for 18-22 minutes.
  2. Check for doneness by inserting a toothpick in the center—if it comes out clean, the cake is ready.
  3. Allow the cake to cool completely before decorating.

📌 Baking Tip: If making multiple layers, slice the cake into even halves using a serrated knife once cooled.


Step 3: Make the Frosting

  1. In a bowl, beat butter until smooth and creamy.
  2. Gradually add powdered sugar, mixing continuously.
  3. Add vanilla extract, salt, and milk, beating until the frosting is fluffy and spreadable.

📌 Texture Hack: If the frosting is too thick, add a few drops of milk. If too thin, add more powdered sugar.


Step 4: Assemble & Decorate

  1. If making a two-layer cake, spread jam or ganache on the first layer.
  2. Place the second cake layer on top and frost the entire cake with buttercream.
  3. Use a small spatula or piping bag to create fun designs.
  4. Decorate with sprinkles, edible flowers, or chocolate drizzle for a beautiful finish.

📌 Storage Tip: Store in an airtight container in the fridge for up to 3 days.

Notes

1️⃣ Prevent the Cake from Drying Out

✔ Use softened butter and full-fat milk to retain moisture.
✔ Avoid overbaking—check for doneness with a toothpick after 18 minutes.
✔ Cover the cake immediately after cooling with plastic wrap to prevent dryness.

2️⃣ Achieve Perfect Frosting Stability

✔ Use well-whipped buttercream for a smooth and easy-to-spread texture.
✔ Refrigerate the cake for 15-20 minutes after frosting to set the icing.
✔ If the frosting is too soft, add more powdered sugar to thicken it.

3️⃣ Packing & Transporting Tips

✔ Use a mini cake box to protect the cake from smudging.
✔ Place a small piece of parchment paper on top to prevent the lid from touching the frosting.
✔ Keep the cake refrigerated overnight to help it set and stay fresh during transport.

These tips will help you create a perfect, mess-free, and delicious lunch box cake every time! 🍰✨

  • Prep Time: 15 minutes
  • Cook Time: 20 minutes
  • Cuisine: Korean-Inspired / Dessert

Nutrition

  • Serving Size: 1 mini lunch box cake (serves 2-3 people)
  • Calories: ~320 kcal
  • Sugar: ~28g
  • Fat: ~15g
  • Carbohydrates: ~40g
  • Protein: ~4g