Phase behavior of Cacio and Pepe sauce

Original Article ↗ Hacker News Discussion ↗

Humor and Reception

  • Many find the paper delightful and hope it wins an Ig Nobel.
  • The phase diagrams are praised as raising the bar for recipe precision.
  • Some see the work as playful but still legitimate soft condensed matter research.

Cooking as Science vs Folk Wisdom

  • Several comments note that this level of analysis already exists in advanced cooking, baking, confectionery, and coffee.
  • Others emphasize that traditional cooks (e.g., Italian grandmothers) succeed without formal science, using intuition and experience.
  • There is debate over whether recipes should aim for an “optimal” result vs. accepting personal preference.

Starch, Pasta Water, and Thickening

  • Core takeaway: additional starch (corn or potato starch) stabilizes the emulsion; some prefer flour for flavor or texture.
  • Multiple posts discuss “pasta risottata” (cooking pasta in minimal water) to concentrate starch vs. adding pure starch.
  • Disagreement over whether normal pasta water ever has enough starch; the paper and some commenters say no, others claim success with minimal water.
  • Some argue restaurant pasta water is highly starchy from continuous use; others say reusing water across days is unlikely or unappealing.

Temperature, Emulsions, and Failure Modes

  • Many report clumpy, “mozzarella-like” failures and link them to temperature being too high or small temperature variations.
  • Suggestions include using IR thermometers; traditional cooks are said to “just know” when it’s right.
  • General point: many home emulsions (sauces, gravies) fail for similar reasons.

Sodium Citrate and Cheese Behavior

  • Several recommend a small amount of sodium citrate to make the cheese melt smoothly, “processed cheese–style.”
  • One commenter claims citric acid alone can substitute; another reports it fails and gives a chemical explanation.
  • The paper’s author appears in the thread and confirms the sodium citrate trick works, though not fully mapped in phase diagrams yet.
  • Some detail DIY sodium citrate via citric acid and baking soda, with minor chemistry disagreements.

Italian Tradition, Portions, and Meal Structure

  • Discussion of small plated portions in videos: some say they’re appropriate for Italian multi-course meals (primo piatto), others find them too small for a main.
  • Thread explores differences between home/family-style vs. restaurant/prix-fixe portions and cultural expectations around “enough food.”