These tiny pancakes consist of three parts — the shell which is crisp and lightly chewy at the same time, the custard filling, and the topping which can be sweet corn, scallions or tiny cubes of cooked taro. In Chiang Mai, we tried the ones with corn and scallion toppings, they were lovely but, for me, it was the ones with scallion that made me gasp in appreciation — with total abandon, I must say.
Place all the ingredients for the shell in a blender and pulse several times until no large pieces remain but the mixture is still a bit chunky. Transfer to a bowl, scraping off the sides of the blender pitcher.
Make the custard filling
In a bowl, mix all the ingredients for the filling until smooth.
Cook the pancakes
Heat a takoyaki pan on the stove top. Keep the temperature on medium.
Pour a teaspoonful of the shell batter into each indentation. It is important to stir the batter before in the bowl each time you scoop out a teaspoonful to make sure that the solids do not settle at the bottom of the bowl.
Pour a teaspoonful of the custard filling on top of the shall batter. Again, it is the better practice to stir the custard filling in the bowl each time you take a teaspoonful to prevent the rice flour from settling at the bottom.
When the pancake is bubbly along the edges, add a pinch or two of your preferred topping.
When the edges of the pancakes are browned, take a skewer to tilt each pancake one by one and, with your other hand, use a spoon to scoop out the pancake and move it to a cooling rack.
Serve the Thai coconut custard pancakes
These pancakes are best while hot. But be careful because the custard can scorch your mouth. So, wait a minute or so after they are removed from the pan before popping them into your mouth.