Prepare all ingredients.

In a bowl, whisk eggs and sugar until the sugar dissolves completely.

Combine glutinous rice flour, chocolate powder, and baking powder in a separate bag or container and shake well.

Add the dry mixture to the egg mixture and mix until smooth.

Line a baking pan with parchment paper and pour the batter in. Stir gently with a chopstick to remove air bubbles.

Sprinkle chopped walnuts on top. Cover with a lid and cook on induction at level 5 for 30 minutes or on a gas stove at low heat for 35 minutes.

Check if the cake is cooked by opening the lid. Let it cool on a rack.

Cut the cooled rice cake into pieces using scissors.