In a large mixing bowl, combine rice flour, tempura flour, shredded coconut, sugar, and sesame seeds. Create an opening in the middle, and slowly add ice-cold water while whisking to blend. Follow this up by adding in coconut milk and whisking.
SLICE AND BATTER THE BANANAS
Cut the bananas into 3 thin slices each. Submerge all your banana slices into the prepared batter.
DEEP-FRY THE BATTERED BANANA SLICES
Place a large wok or deep-frying pan filled with oil over medium-low heat. If you have them, you can add fresh pandan for extra aroma, totally optional.
Use kitchen tongs to dip the banana slices into the batter, making sure they're well-coated.
Deep-fry the bananas, making sure not to overcrowd the pan, or you'll end up with a sticky mess. Flip regularly for even frying.
Fry until golden-brown and crisp. Take them out and let them drain on a sieve or paper towel to get rid of excess oil.
Notes
Use the nutrition card in this recipe as a guideline.
If you can't find Thai bananas like 'kluay hom', 'namwa', or 'kluay kai', super-ripe plantains are a great alternative. The riper, the better for achieving that authentic Thai sweetness. If you use Thai bananas, they should be yellow.
If you're a sweet tooth, feel free to add more sugar.