If you live outside the Philippines, you can still have access to saba bananas. Just check your neighborhood Asian grocery stores and Filipino grocery stores, specifically at the produce section. Here in the Bay Area, they're not that expensive. Choose saba bananas that are soft and tender when pinched. You can also use plantains as an alternative.
Aside from vanilla extract, you can also add nutmeg and/or cinnamon.
In the US, non-organic brown sugar is not vegan because it uses animal bone char in its refining process.
You can make homemade shaved ice by getting an ice shaver, which you can find at Asian grocery stores. It looks like this:
