To begin, take a large bowl and combine the flour, caster sugar, salt, and baking powder. Mix well using a whisk to evenly distribute the dry ingredients. This ensures the pancake rises uniformly and avoids lumps in your final batter.

In a small cup, dissolve the instant yeast in warm water. Let it sit for 5 minutes until slightly frothy. This activation step helps develop the classic airy texture of Martabak Manis. Once frothy, pour it into the flour mixture.

Add the egg to the bowl and whisk the batter thoroughly until smooth with no dry spots. The batter should be pourable but slightly thick. Cover the bowl with a clean cloth and let it rest for 45 minutes to an hour at room temperature. This fermentation develops flavour and fluffiness.

Preheat a non-stick pan over low to medium heat for 5 minutes. Brush lightly with butter to prevent sticking. A well heated pan ensures the pancake forms its signature honeycomb texture.

Pour the rested batter into the pan, swirling it gently to form an even circle. Cover the pan with a lid and cook for 10-12 minutes until bubbles form and the top sets. Avoid high heat to prevent burning the bottom before the top is cooked.

Once the surface is set but still slightly moist, sprinkle granulated sugar evenly over the pancake. Replace the lid and cook for another 2 minutes until the sugar slightly melts in.

Turn off the heat and remove the pancake carefully onto a flat surface. Brush the entire surface generously with melted butter to keep it moist and fragrant. Transition to filling preparation immediately for best results.

Sprinkle roasted peanuts and chocolate sprinkles evenly over the buttered surface. For a traditional twist, add grated cheddar cheese before drizzling with sweetened condensed milk for richness.

Using a flat spatula, fold the pancake in half to enclose the fillings. Press gently to secure. The melted chocolate and cheese should fuse slightly with the warm interior, creating a layered sweetness.

Cut into even slices and serve warm as a delightful snack or dessert. Pair with unsweetened tea or black coffee to balance the sweetness. Martabak Manis is best enjoyed freshly made when the pancake is soft, warm, and fragrant.