Biko is a traditional type of Filipino rice cake made by combining 2 cups of cooked sticky rice with 4 cups of reduced coconut milk mixed with brown sugar and a pinch of salt. The coconut milk needs to simmer for a few minutes until thickened. After adding the rice to the wet mixture, cook it slowly on low heat until dry. Finally, let it cool down slightly and give it a flat shape.
Prepare sticky rice as usual using a rice cooker. You can use 2 cups of any type of glutinous rice, cooking the rice slowly until all the liquid evaporates but ensuring the rice doesn't overcook. In the meantime, mix 2 cups of brown sugar with 4 cups of coconut milk and a pinch of salt. Let it simmer on low heat until it thickens. Stir gently if necessary. Add the cooked rice to the wet mixture and mix well. When the mixture is dry enough, scoop it in a tray and flatten it or give it any shape you prefer.
There are several versions of rice cakes in the Philippines. Biko, also called malagkit, is a popular type of traditional dessert or sweet snack that can be served on banana leaves. You can also use some extra reduced coconut milk as a serving sauce.