Texture on the Plate.
A crisp tuile laid on a scoop of sorbet is perfect for about two minutes. Laid beside it, it lasts ten — the difference between a wet surface and a dry one.
Texture is half of what makes food satisfying (XI.10). Diners enjoy contrast within a mouthful — crisp skin over soft flesh, crunchy nuts in a creamy dessert, a crouton in a smooth soup, a cold sorbet on a warm tart — and a plate of all-soft or all-crunchy food palls quickly. Cooks therefore add a contrasting element on purpose: a crumb, a crisp, toasted seeds, a raw shaved vegetable, a quenelle of something cold. Sound is part of it: crispness is partly heard, and studies show foods are rated crisper when their crunch is amplified.
Crisp foods are dry, with water activity around 0.3–0.5 (III.9); sauces, purées and ice creams are near 1. Put them in contact and water migrates from wet to dry until both meet in the middle: the crisp element absorbs water, its glassy starch and sugar soften (above a critical water content they pass their glass transition and turn leathery), and the crunch is gone (XV.9 on fried food going soggy). So crisp elements go on last, at the pass, on a dry part of the plate or on top rather than under; sauce goes under the main item, not over its crisp skin; and crisp garnishes are made as dry as possible, with fat or sugar coatings that slow water uptake. The workshop times a crisp.
Below: how much crispness a crisp garnish keeps over the minutes from the pass to the bite, placed in the sauce, on top of a moist element, or beside it on the dry plate (teaching first-order softening with times consistent with kitchen practice).
- Build texture contrast into a dish.
- Explain why crisp things go soft.
- Place crisp elements to last.
- Use hot and cold contrast.
Crisp last, crisp on top, crisp apart
In the teaching model three minutes after the pass, a crisp sitting in the sauce keeps about 0.22 of its crunch, one on top of a moist element 0.55, one beside it on the dry plate 0.86. The table is never instant — plates wait at the pass, travel, are photographed — so a crisp that only survives a minute is a crisp the diner will rarely taste.
Practical texture: add one contrasting texture to every soft dish (toasted nuts or seeds, crumbs fried in butter, crackling, a tuile, raw shaved vegetables, pickles); place crisp elements last and on top or beside, never under a sauce; sauce under the meat, not over crisp skin; make crisps thin and fully dry, and store them airtight with a little desiccant or in a warm dry place; for hot–cold contrast, serve the cold element straight from the freezer onto a warm, not hot, plate, and get the plate to the table at once.
Put three croutons on a bowl of soup: one in the soup, one on a spoon of cream on top, one on the rim. Taste each after three minutes.
Terms
- Texture contrast
- Different textures within a dish or mouthful.
- Moisture migration
- Water moving from wet to dry components.
- Glass transition
- The point at which a crisp turns leathery as it absorbs water.
- Tuile
- A thin crisp wafer, often of batter or sugar.
Sources
- A teaching value chosen for the course: the right order of magnitude and shape, not a measurement of a particular food.
- H. McGee, On Food and Cooking: The Science and Lore of the Kitchen, 2nd ed., Scribner, 2004.