Pasta and couscous, whether or not prepared, fall specifically under heading 1902 regardless of whether they contain eggs, are stuffed, or are cooked. Other flour-based preparations — such as malt extract foods, infant cereals, or pancake mixes — go to heading 1901. The key is whether the product is recognizably pasta or couscous in form; if so, 1902 applies even if it contains additional ingredients.

Cereal-based bars are generally classified under heading 1904, which covers foods prepared by swelling or roasting cereals or cereal products, as well as other cereal-grain preparations. If the bar's primary character comes from baked dough rather than expanded grain, it may instead fall under heading 1905. The physical form and production method — puffed, extruded, or baked — guide the classification decision.