Fill each preheated cup about ¾ full with the batter. Steam over medium heat for 18–20 minutes if using larger muffin cups, or 12–15 minutes for smaller molds. The surface should appear set, but the center may still look slightly glossy—that’s normal and will dry out as it cools.
If you're steaming in batches and your steamer can't accommodate all the cups at once, don’t pre-fill the molds with batter. The starch tends to settle, which can affect the consistency. Always stir the batter before pouring it into each round of molds to keep it well mixed.
Once steamed, let the kuih cool for 5 minutes. Gently loosen the edges with a soft rubber spatula and lift the cakes out. While still slightly warm, generously coat the tops with the steamed coconut topping. Serve fresh for the best texture.
For subsequent batches, ensure the steamer water returns to a vigorous boil before you begin, and remember to preheat the molds again before pouring the next round of batter.