Wednesday, December 22nd, 2010

Update: I’ve written up a short post about no-knead bread in Norwegian – Brød uten å kna – to accompany my appearance in the popular science program Schrödingers katt.
I know – since the NY Times article about Jim Lahey in 2006 the no-knead breads have been all over the internet, newspapers and now even appear in numerous books – this is really old news. But the no-knead breads are really tasty as well, so I hope you’ll forgive me! When I give popular science talks about chemistry in the kitchen the one thing I’m always asked about is the no-knead recipe I show, so I thought it was about time to publish a recipe. Surely, everyone can google it – but regrettably many (if not most?) recipes are given in non-metric, volume based units – even Jim Lahey’s original recipe. And for baking this is really a drawback because the density of flour depends so much on how tight you pack it. Oh yeah, and I will also try to explain why and how the no-knead bread works.
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Tags: Baker's percentage, baker's yeast, baking, bread, cast iron, Dutch oven, flour, hydration, Jim Lahey, molecular gastronomy, no-knead, Saccharomyces cerevisiae, volume measurement, weight measurement, yeast, yeast viability
Posted in equipment, molecular gastronomy, news articles, recipe, science | 26 Comments »
Friday, December 17th, 2010

Mixing tomato ketchup with horseradish causes it to gel over night
A while ago a reader sent me a very interesting question regarding a gelled seafood sauce. It is made by mixing tomato ketchup with horseradish and his question was very simple: Why and how does this sauce gel? He speculated about pectin (which is present in tomatoes), but wondered why ketchup then doesn’t gel on it’s own? And he also noted that horseradish ground with water does not have any gel like properties. So how come they can form a gel when mixed together?
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Tags: enzyme, gelling, HM pectin, horseradish, horseradish peroxidase, HRP, ketchup, LM pectin, pectin, pectin methylesterase, PME, tomato
Posted in experiments, hydrocolloids, molecular gastronomy, recipe, science | 9 Comments »