I had posted some kaya photos before, but not the detailed steps on making kaya. We made commercial quantity to be distributed together with the alkaline dumpling(kee chang). So you might want to consider only 1/4 of the ingredients below.
Beat 25 eggs in a big pot.
Add in 4kg sugar and double boil the mixture. Keep stirring until the sugar has dissolved.
Add in 4kg of filtered coconut milk.
Add in pandan leaves. The more the better.
Stir for another 5-10 mins. Then cover the pot for double boil.
The double boil process will take about 4 hours.
In between, stir occasionally(~every 30 mins).
Boil a cup of sugar together with a cup of water with medium heat.
Boil until the water has evaporated and the sugar turned into dark brown caramel.
Add the caramel into the kaya for coloring purpose.
Double boil for another half an hour and it is done.