Yes, you can absolutely take biscuits through airport security in 2026. Biscuits, cookies, and other solid dry food items are permitted in both carry-on and checked luggage without quantity restrictions. The primary "red flag" for food at security is the consistency; if the "biscuit" includes a liquid or gel filling (like a lava cake or a very runny jam center) over 100ml, it could be confiscated. In 2026, many airports use CT scanners that allow you to keep food inside your bag, but some TSA or international agents may still ask you to "separate" food items into a bin to ensure the organic material doesn't clutter the X-ray image. As long as they are solid and not a liquid/gel, your snacks are safe to fly.