Recipe for the Addictive Indonesian 'Kue Balok Lumer' (Melted Block Cake) -->

Recipe for the Addictive Indonesian 'Kue Balok Lumer' (Melted Block Cake)

Oct 18, 2025, October 18, 2025

 

Foto:tiktok

VISTORBELITUNG.COM,– Have you ever encountered a snack that's simple yet utterly irresistible? Meet Kue Balok Lumer—a small, rectangular, rich chocolate cake that’s currently dominating Indonesia’s street food and café scene, especially originating from West Java.


​Unlike ordinary brownies or cakes, the secret to Kue Balok Lumer lies in its name: 'Lumer', meaning melted or molten. When you take a bite, the center oozes with warm, silky chocolate, creating a delightful sensation that keeps people coming back for more. It’s the perfect blend of chewy edges and a flowing, soft core.


​Good news for chocolate lovers! You don't need to travel all the way to Bandung to enjoy this viral dessert. We’ve prepared a straightforward recipe so you can recreate this addictive treat right in your kitchen.

The Star of the Show: Kue Balok Lumer

​The cake itself is typically cooked in a special cast-iron mold, giving it its signature block shape, resembling a small brick (balok). The quick cooking time and high heat are crucial to achieving that desirable molten center.


​Ready to bake? Here are the ingredients and simple steps you need to follow.


Ingredients:

A. Dry Ingredients:

  • ​Medium Protein Wheat Flour: 150 grams
  • ​Cocoa Powder (good quality for intense flavor): 15 grams
  • ​Baking Soda: 1/2 teaspoon
  • ​Salt: A pinch

B. Wet/Fat Ingredients:

  • ​Dark Cooking Chocolate (DCC), chopped: 80 grams
  • ​Unsalted Butter or Margarine: 80 grams
  • ​Granulated Sugar: 120 grams (adjust to taste)
  • ​Eggs (large): 2 pieces
  • ​Liquid Milk (Full Cream): 100 ml
  • ​Vanilla Extract: 1 teaspoon

C. The 'Lumer' Center (Optional but highly recommended):

  • ​Dark Cooking Chocolate (DCC), chopped: 50 grams
  • ​Heavy Cream or Condensed Milk: 30 ml

How to Make the Addictive Kue Balok Lumer:


Step 1: Prepare the Molten Center (Ganache)

  1. ​Combine the chopped DCC (50g) and heavy cream/condensed milk (30ml) in a small bowl.
  2. ​Melt this mixture using a double boiler method (bain-marie) or briefly in a microwave until smooth.
  3. ​Let it cool slightly. This will be the secret molten filling.

Step 2: Melt the Chocolate Base

  1. ​In a separate bowl, melt the main portion of DCC (80g) and butter/margarine (80g) together using the double boiler method until completely smooth. Set aside to cool to room temperature.

Step 3: Combine the Batter

  1. ​In a large bowl, whisk the eggs and sugar until the sugar dissolves and the mixture is slightly pale. You don't need to whip it until fluffy—just enough to combine.
  2. ​Pour the cooled melted chocolate and butter mixture into the egg mixture. Add the vanilla extract. Whisk until fully incorporated.
  3. ​In a separate bowl, sift together all the dry ingredients (flour, cocoa powder, baking soda, and salt).
  4. ​Add the sifted dry mixture into the wet ingredients in three stages, alternating with the liquid milk. Start and end with the dry ingredients. Tip: Do not overmix! Stir just until no lumps of flour remain.

Step 4: The Baking Process

  1. ​Preheat your Kue Balok mold (or a mini brownie pan/cupcake pan if you don't have the specific mold) over medium-low heat. Brush lightly with oil or butter.
  2. ​Pour the batter into the prepared mold, filling each block halfway.
  3. ​Place about one teaspoon of the pre-made molten center (Step 1) into the middle of the batter in each block.
  4. ​Cover the filling with a little more batter, filling the mold up to about 3/4 full.
  5. ​Cover the mold and bake/cook over very low heat for about 5 to 10 minutes. The baking time depends entirely on your desired 'lumer' level!
    • For Maximum Lumer (Molten): Bake for 5-7 minutes. The center should still be very soft.
    • For a Chewy Brownie Texture: Bake for 8-10 minutes.
  6. ​Once done, lift the cakes out of the mold.

Serving Suggestion

​Serve your Kue Balok Lumer while it is still warm to guarantee the perfect, melted chocolate flow. Enjoy this iconic Indonesian treat with a glass of cold milk or a cup of warm coffee.

Happy baking, vistorbelitung! Don't forget to share your results with us!

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