Watalappam (also called watalappan or vattalappam) (Sinhala: වටලප්පන්, Tamil: வட்டலாப்பம், Sri Lankan Malay: serikaya) is a Sri Lankan coconut custard pudding made of coconut milk or condensed milk, jaggery, cashew nuts, eggs, various spices, including cardamom, cloves,[1] and nutmeg, and sometimes thick pandan juice or grated vanilla pods.

It is more likely that the dessert is derived from a Malay dish known as serikaya, which is a steamed custard made from eggs, coconut milk, palm sugar and pandan or screwpine leaves.

[3] It is likely that it is a word borrowed from the Dutch, Vla, which means a custard, and was applied by the Moors as a vernacular name, vattil-appan, using the Tamil phrasing.

[4] The dessert has come to be strongly identified with Sri Lanka's Muslim community and is a part of a traditional Eid al-Fitr celebrations, marking the end of Ramadan.

It is also popular during weddings, religious festivals and other social functions and celebrations.