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YOUR CART

There is no secret recipe.
It is our perspective of understanding the nature
​of flour, water, salt and yeast.

5/16/2017 6 Comments

Part 2 - Can we tell how something tastes just by the look of it? 第二部分 - 能否單靠外表得知食品好吃與否?

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Following our previous discussion, this time we give an extensive analysis on the example when the flavor is loss during the fabrication of the desirable open crumb structure in a baguette. We use high quality French T65 wheat flour, which has a “breakfast-cereal-like” flavor. However it is susceptible to seasonal variation in gluten composition throughout the year as it contains no chemical stabilizer.
 
繼之前的討論,這次我們向大家仔細地分析一個例子,看看一味追求製造大孔洞結構時,有甚麼原因會導致傳統法國長棒麵包的風味流失。我們使用的是優質的法國T65小麥粉。它的風味類似早餐穀麥片的味道。因為它沒有添加化學穩定劑,麩質季節性的不穩定頗為明顯。
 
There is two well-known methods to fabricate an open crumb structure:
 
The maximum of dough hydration and oxidation method (fig. a1, b1, c1) The minimum of dough hydration and oxidation method (fig. a2, b2, c2)  

製造大孔洞結構有兩種廣為人知的方法:
 
麵團最大限度的含水量和氧化方法(圖a1,b1,c1) 麵團最小限度的含水量和氧化方法(圖a2,b2,c2)  
​
The first method is commonly practiced by modern Japanese and Taiwanese bakers. The second method is very rare and practiced by a handful of the very traditional rural French bakery. The technical difficulty of both methods are unmatched, so as the quality of the final product.
 
現代日本和台灣麵包師常採用第一種方法。第二種方法非常罕見,只有少數傳統農村法國麵包店仍然使用。論方法的技術難度乃至成品的質素,後者絕難與前者相比,直是天壤雲泥之別。
 
The first method is always very easy to implement. One only needs to knead until the gluten structure is well developed and adding enough water to dilute the gluten matrix. Final products have good volume consistently as the oxidation compensates any seasonal variation of the elasticity of the flour. In the horizontal cross section it gives a seemingly open crumb structure (fig. a1). However the crust is always weak and the shelf life of the “crispiness” is very short. Because of the strong gluten development it fails to produce an open crumb structure in the vertical direction (fig. b1). The “ear” (the breaking of the surface due to the scoring prior of baking) is very prominent as a result of the elasticity of the dough (fig. c1).
 

第一種方法總是很方便的。只需要搓揉麵團,直到麩質結構完全擴展,並添加足夠的水來稀釋麩質架構。因為氧化補償了麵粉彈性的任何季節變化,最終產品具有穩定而良好的體積。在水平橫切面中,它擁有一個看似大孔洞的結構(圖a1)。然而,焦皮總是過於薄弱,“脆”的口感維持時間很短。由於形成了強勁的麩質結構,它不能在垂直方向上產生大孔洞結構(圖b1)。由於麵團的彈力,裂口的“耳朵”(烘焙前的劃上的刀痕)非常突出(圖c1)。
 
The second method requires the baker to have more attention and experience of the gluten development during the kneading and proofing of the dough. The slightly over-knead or under-knead will result in a tough or flat product. Ratio of different preferment and levain added into the dough need to be adjusted quite often to adapt to the seasonal changes of the flour. When this method is carried out perfectly, it gives a sturdy biscuit like crust and creamy crumb as the oxidation of the dough is minimum (fig. a2). The open crumb structure is observable in both horizontal (fig. a2) and vertical direction (fig. b2), which tells us that the crust is crispy all around. The “ear” is minimum. It is more like “tear-open-sideway” (fig. c2) than a “flap-of-ear” as a result of weak gluten development. The similar breaking of the surface pattern can be found in pound cake as well.
 
第二種方法需要富有經驗麵包師,在麵團的混合和發酵期間更須仔細的留意麵筋的成形。稍微混合過度或混合不足會導致成品扁平或過於堅韌。添加到麵團中的不同麵種和天然酵母的比例需要經常調整以適應麵粉的季節性變化。當這種方法完美地實踐時,因為麵團的氧化被限制至極限,成品會有完整餅乾般口感的外皮以及柔潤的內層(圖a2)。大孔洞結構在水平(圖a2)和垂直方向(圖b2)都可以觀察到。這告訴我們,四方八面的表皮都是酥脆的。由於麩質連結薄弱,裂口更像“側面撕開式”(圖c2),而不是“一大片耳朵”。類似的裂口形態也可以在磅蛋糕中找到。
 
The main drawbacks of the first method is that the high hydration method simply dilutes the concentration of flour in the dough, and the oxidation destroys the flavor of the wheat, which renders the final product a tasteless sponge. In Levain Bakery, we always use the second method to make our baguettes. The reason is simple: it presents the best wheat flavor, gives a biscuit like crust and the longest shelf life. We believe that the more you add to the recipe the more you take away. The traditional method may not be the simplest way, but it usually gives the most satisfactory result.
 
第一種方法的主要缺點是麵團的高水量稀釋了麵粉的濃度,氧化破壞了小麥的香味,使最終產品成為淡而無味的「海綿」。在Levain Bakery,我們祗堅持使用第二種方法來製作我們的長棒麵包。原因很簡單:它呈現出最好的小麥風味,形成餅乾般的外皮和最長的保質期。我們相信,過多改動食譜反而適得期反。傳統方法可能不是最簡單的方法,但通常會帶出最令人滿意的結果。

6 Comments

5/7/2017 7 Comments

Can we tell how something tastes just by the look of it? 能單靠外表得知食品好吃與否?

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The answer is yes and no.

答案是可以...及不可以。

NO you cannot tell the flavor of anything just by the look of it. But YES you can tell the texture of the food by looking at the cross section of it. The texture of a bakery product is mainly based on two things:

不能單靠外表斷定的是味道。可是食物的質感憑其切面的形態可得知一二。烘焙產品的質感取決於兩樣事情﹕

1.         The chemical composition of the product

2.         The microstructure of the crust and the crumb

1.      成品的材質

2.      表皮及內層的微結構

When it comes to the texture, the product microstructure is more important than its composition. Without a suitable structure, usually a honeycomb structure, the product veers from a flaky and crunchy texture to an undesirable chewy and rock-hard one.

微結構對於烘焙產品的質感影響較材質更大。沒有合適的結構(一般如蜂窩狀)質感可以由酥脆、爽脆、變成耐嚼甚至堅硬。

In all cases, there must be a small vacancy that separates the crust from the crumb. The separation makes the following possible: 

在所有個案中,表皮與內層都會由一些細少的空間所分隔。這分隔起到如下的作用﹕

1.         During baking, the heat transfer from the crust to the crumb is slower

2.         During baking, the crust can be baked more thoroughly than the crumb

3.         After baking, diffusion of the moisture from the crumb to the crust is slower

1.      在烘焙的過程中,由表皮傳熱至內層的速度減慢

2.      在烘焙的過程中,表皮比內層烤得更透徹

3.      烘焙後,水份從內層擴散至表皮的速度減慢

The above are the main criteria if the crust is going to be crispy and stay for how long in ambient environment.

以上過程對於外皮是否脆及在大氣環境下維持脆的時間起著關鍵作用。

Then we need to go into details about the thickness of the crust. If the crust is too thick and is mainly composed of flour, then it will be too hard to chew on. If it is thin like paper (fig. b3, c3), it will absorb moisture too quickly and lose its crispiness. A decent thickness is when the crust is one or two tiny bubbles thick (fig. a2, b2, c2).

然後,我們要仔細分考量表皮的厚度。假若表皮過厚而構成的材料主要是麵粉,結果是口感過於堅硬難以嘴嚼。假若表皮太薄如紙一般(圖b3、c3),表皮又會太易受潮而提早軟化。一般當表皮中有一到兩個小氣泡時厚度最為合適(圖a2、b2、c2)。

The crust texture can also be altered with the addition of other ingredients. A common addition is fat (fig. b1-b3) as it shortens the gluten chain and thickens the crust slightly. This results in a flakier and crunchy crust - provided that the crust is thick enough and thoroughly baked. Another common method is to have egg white and sugar to create the crust (fig. c1-c3). This can increase the crust thickness to a point where it becomes crispy and crunchy like rock candy.

當表皮的材料包括油脂(圖b1-b3),因油脂將蛋白鍊切斷令其更酥脆,表皮厚度能稍微增加,在有足夠的厚度並確實的烤透的前提下,甚至能成為爽脆的口感。當表皮有足夠的蛋白及糖(圖c1-c3),厚度甚至能提升至使表皮擁有如糖果般的硬爽脆。

In a bid to achieve a beautiful crumb, a common mistake is to create big bubbles in the middle of the crumb while the crust remains attached to it (fig. a1, a3, b1, c1). Unless the baker intends to pipe fillings within the product, this does not serve any purpose. It is also futile if the product is underbaked, a common problem when the crust is about the same color as the crumb (fig. a1, b1, b3). This leads me to another topic - whether we bake our bread too dark at Levain…

除非你希望在內層中空的地方注入餡料,否則在只在內層製作出大氣孔而不及分佈至表皮使之與內層分雜實在是毫無意義的(圖a1、a3、b1、c1)。烘烤不足使表皮與內層的色澤相近後果更是慘不忍睹(圖a1、b1、b3)。這帶出了我們另一個討論主題,就是我們天然酵母麵包店的出品顏色是否過深...

7 Comments

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    Master KC Li

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