Combine glutinous rice flour and sugar. Mix well.
Pour in the condensed milk, coconut milk, and vanilla extract. Mix until the texture becomes smooth.
Divide the mixture into 3 parts.
Add purple yam, ube extract, and violet food coloring to the first part and stir well.
Add jackfruit to the second part along with the yellow food coloring and mix well. Note: Leave the third part alone.
Place the first part (purple) in a greased dish/mold. Cover the dish/mold with cheesecloth and steam for 12-16 minutes.
Remove the dish/mold and pour in the white mixture as a second layer. Use a spatula to spread it over the purple mixture Steam for an additional 12-16 minutes.
Remove the dish/mold from the steamer and pour in the yellow mixture. Spread the mixture with a spatula. Steam for 15 to 20 minutes with a cheesecloth cover.
If the mixture is still a little watery, steam for an additional 5 minutes.
Apply oil to the sapin sapin (purple part facing up) with a brush.
Sprinkle with latik.