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Classification of Steamed Breads and Buns (Part 2)

Classification of Steamed Breads and Buns (Part 1)

A. DIFFERENCES IN INGREDIENTS The ingredients for traditional northern- and southern-style steamed breads are very simple: flour, water, and yeast or sourdough (Huang and Miskelly, 1991). Guangdong-style steamed bread may contain up to 25% sugar and 10% fat (Huang and Quail, 1997). Lard was the traditional source of fat, but has now been replaced by fats derived from palm or soy beans. Raising agents, particularly ammonium bicarbonate, have also been used to increase the softness. Dried milk powder or fresh milk is often used to enhance the flavor and protein content.
B. DIFFERENCES IN PHYSICAL PROPERTIES AND EATING QUALITY Key steamed bread quality parameters include specific volume, spread ratio, skin smoothness, color, and texture.
1. Specific Volume Specific volume is defined as the ratio of volume in milliliters to the weight ingrams. The specific volume for northern-style steamed bread is less than 2.5, while the specific volume fo…

Classification of Steamed Breads and Buns (Part 1)

Various forms of steamed products such as steamed bread, buns, and twisted rolls have developed throughout Chinese history (Table 2.1). These were regionally based on differences in geography, weather, agricultural products, and eating habits. Thus different formulations, processing methods, and quality preferences evolved. In northern China, which is a semiarid region, wheat is the main crop and steamed bread is a staple food. Northern-style steamed bread with firm, elastic, and cohesive eating quality is preferred as it provides greater satiety. The steamed bread should also have good chewing properties and a natural wheat flavor.
In southern China, which has a warm climate, rice rather than wheat is the staple food. Popular breakfast foods in the south include southern-style steamed bread and rice porridge. Southern-style steamed breads which are soft and a bit chewy are preferred over the traditional northern-style breads. In the Guangdong region of southern China, rice is the st…

Similarities between Stemed Buns and Other Wheat-Based Products

Other wheat-based products with fillings have developed throughout the world. Chinese dumplings (jiaozi) and European ravioli are prepared from thin wrappers similar to noodle or pasta dough sheets which are then used to enclose fillings. Other examples of European dumplings include pelmeni, pierogi, and kreplach. Unlike steamed buns, these doughs are not yeasted and the products are cooked by boiling. Germknoedel is a yeasted dumpling or steamed bun often filled with cooked plums and is a specialty of Austria and Bavaria. A related product, dampfnudeln, is fried to create a crispy base before steaming. The method of cooking is similar to that used for Chinese dumplings, although the characteristics and taste of the products are completely different.

CURRENT STATUS In China and other developing parts of Asia, there has been a rapid commercialization of the food and food distribution sectors. In the cities, manual and semimechanized production has been replaced by more efficient automat…

Similarities and Differences Between Baked and Steamed Bread

There are many similarities between Western bread and steamed bread. Western bread and steamed bread are both fermented wheaten products. Both are light, porous, flavorsome, and easily digested. Production steps are similar for both, except that Western bread is baked in an oven above 200°C, whereas steamed bread is cooked in a steamer. The differences are described below.
1. Ingredients The majority of steamed breads require only wheat flour, water, and yeast or sourdough. Guangdong-style steamed breads may contain additional ingredients such as fat and sugar. In Western bread making, other ingredients such as fat, sugar, salt, milk powder, emulsifier, and bread improvers are commonly used. Western bread requires flour with higher protein content and good protein quality compared with steamed bread (Rubenthaler et al., 1992), while a wider range of protein content is suitable for steamed bread (Huang and Hao, 1994). Flour color is more critical for steamed bread, as it should have a …

Steamed Product Types

China is the world’s largest producer of wheat, which is mainly grown in the north, and so it is in the north that steamed bread or mantou is a staple food. It is usually eaten hot and can be consumed at all meals. In southern China, which is a rice-growing area, steamed bread is eaten mostly at breakfast. Steamed bread popularity has spread throughout China, and can be found even in remote areas.
Steamed bread was introduced to Japan during the Song and Yuan Dynasties. Lin Jingyin introduced steamed bread to Japan and this is celebrated annually (Ni, 2004). According to the Japanese pronunciation, steamed bun is called “manju” and products consumed have various types of fillings such as bean paste, meat, curry, sweet and sour pork, walnut, vegetables, prawn, beef, and shell fish. Manju can also be made with rice flour. In Korea, steamed products are the second most popular wheat product after cold buckwheat noodles known as naengmyon (Nagao, 1995).
Yum cha, which literally means “dr…

Introduction to Steamed Bread

Wheat was grown in the Xinjiang Autonomous Region and Gansu and Henan Provinces in northern China more than 5000 years ago, as has been verified by radiocarbon dating (Dodson et al., 2013). Early Chinese characters found on “oracle bones” (tortoise shells or ox bones used as a form of divination), dating from the Shang Dynasty (1751–1122 BCE), provide written evidence of wheat being widely grown throughout Henan (Fan, 1982). Flour milling commenced during the Warring States period, 475–221 BCE (Chen, 1994, 1995) and became widespread. During this time, the text “Mozigenzhu” recording the work of the famous ancient philosopher Mozi contains a reference to “bing,” which is the common name of cooked wheaten food at that time (Wang, 1984; Zeng, 2002).
Flour-based foods developed further during the Han Dynasty (206–220 AD) and boiled noodles and sesame seed breads gained popularity. It is believed that steamed breads and buns were first produced during the Three Kingdoms period (220–280 …

Baking

1. Why does sandwich bread made from our flour (100% DNS) have a coarser texture when xylanase is added. Whereas we would expect the opposite effect? Xylanases create a finer crumb structure by optimizing the gluten-pentosan network. The network is then able to form thinner membranes so that more and smaller bubbles are formed. The effect depends on the properties of this network (natural fluctuations are possible) and particularly on the properties and dosage of the xylanases. Many xylanases from Trichoderma and also an overdose of other xylanases result in a coarser pore structure. Naturally the processing conditions have an impact on the effect of the enzymes too. A high water addition rate, high dough temperatures and long fermentation increase the tendency towards a coarser crumb.
2. How can crustiness be improved? Given identical baking processes, flour with a lower protein content tends to yield bread with a better and longer-lasting crustiness. Malt flour, amylases and DATEM im…