The key to making Taiwanese Shaved Ice, is the Shaved Ice Maker which needs to make light fluffy snow (a hallmark of really good shaved ice) and the Asian toppings. Luickly, when I set off to make shaved ice at home, I came across a really good and inexpensive shaved ice machine from Hawaiian Shaved Ice (retails on Amazon for under $35). I was worried the ice shavings might not be fluffy enough, but those worries were put to rest after testing it out using the ice moulds to make ice 'pucks'. If you're wondering, it's also okay to use regular ice cubes in this machine, but the texture of the shavings won't be as soft.
How to Prep toppings in a Pressure cooker:
Add the dried beans (or barley) to your pressure cooker and a generous amount of water. The water doesn't need to be exact, but you'll need plenty of water so there's room for the toppings to boil and cook. I was testing out a new pressure cooker machine (the Cuckoo Multi Cooker which is similar to InstantPot) and used the Vegetables setting for 20 - 35 minutes. Discard the water after cooking is complete and rinse under cold water to stop the cooking process. If you like your toppings on the super soft/ mushy side, go closer to the 35 minutes, otherwise I recommend 20-25.
If you want to watch how I made Taiwanese Shaved Ice dessert at home, check out my video recipe/ tutorial I posted on YouTube. Happy Shaved Ice Making!