Similar to the first layer of jelly, measure the sugar and agar agar powder into a bowl. Mix them well so that the agar agar powder is well dispersed in the sugar.
Next, measure water into a saucepan. Add the agar agar and sugar mixture into the water and stir.
Turn on the heat to a medium flame and stir to avoid the agar agar powder from clumping at the bottom of the pan. Let the jelly solution cook to a rolling boil.
Turn the heat to low and add the coconut milk. Stir to mix.
Let the jelly cook on low heat until it comes to a very light simmer (see Note 4). Turn off the heat.
Transfer half of the jelly solution into another pan. Add the blue pea flowers into the pan and stir lightly.
Turn on the heat to a very low flame and let the flowers cook in the hot jelly for about one minute. Make sure the solution does not simmer. If it does, turn off the flame.
Cover the pan with a lid and let the flowers steep for about 3 minutes. Stir occasionally. Once the jelly has reached the desired blue hue, strain the flowers.
Test the clear blue jelly in the cups by touching the surface with your finger tips. The jelly should have set. If not, place it in the fridge for about 5 minutes to quicken the setting process. You can do this process simultaneously as you are preparing the coconut milk jelly above.
Once the first layer is set, divide the blue tinted coconut milk jelly into the jelly cups. Place the cups in the fridge to allow the jelly to set (see Note 5).
Once the second layer is set, pour the final white layer into each cup. Place the cups back in the fridge for this white layer to set completely.