How to cook pasta? Physicists view on suggestions for energy saving methods.

This article investigates the effects of three pasta cooking methods—traditional boiling, the "hofflon" method (heat-off, lid-on), and presoaking—on pasta’s texture, mechanical properties, and moisture content. The hofflon method, proposed by Nobel laureate Giorgio Parisi, involves boiling water, adding pasta, covering the pot, and turning off the heat, resulting in significant energy savings but producing pasta that is softer and less cohesive than traditionally cooked pasta. Presoaking dried pasta in cold water before cooking reduces cooking time and energy use but leads to increased stickiness and a mushier texture due to incomplete starch gelatinization and altered protein interactions. Mechanical tests, including texture profile analysis and tensile experiments, reveal that traditionally cooked pasta exhibits higher hardness, cohesiveness, and chewiness, corresponding to the preferred al dente texture, while alternative methods compromise these qualities despite their environmental benefits. The study also provides a molecular interpretation linking protein cross-linking and starch gelatinization processes to the observed textural differences, offering insights relevant to pasta and other grain-based foods.