Does Taipei Taoyuan Airport allow food to be brought on board?

I think it is possible, I have never heard that food is not allowed. If you are really worried, you can ask the airline in advance.

There are basically no special requirements for food at Taoyuan Airport, and they can be brought in. Just don't bring liquids on board. So you can buy sandwiches etc but just don't buy drinks

Sandwiches and bread are acceptable, but beverages and canned food are not. There is a free water dispenser inside<br/>Please click "Adopt", not "Useful".