Soto ayam is a yellow spicy chicken soup with lontong or nasi himpit or ketupat (all compressed rice that is then cut into small cakes) and/or vermicelli or noodles, commonly found in Indonesia, Singapore, Malaysia and Suriname. Turmeric is added as one of its ingredients to get yellow chicken broth. It is probably the most popular variant of soto, a traditional soup commonly found in Indonesian cuisine. Besides chicken and vermicelli, it can also be served with hard-boiled eggs, slices of fried potatoes, Chinese celery leaves, and fried shallots. Occasionally, people will add "koya", a powder of mixed prawn crackers with fried garlic or orange colored spicy sambal, krupuk or emping is a very common topping.