Chocolate-presentation(非常详尽英文课堂演讲)PPT课件.ppt

Chocolate,By MintySharon,Description of Chocolate,Chocolate is made from cocoa beans found on the cacao tree. The cacao tree was first discovered in the South American rainforest. The three main ingredients in chocolate are chocolate liquor, cocoa powder, and cocoa butter. Different kinds of chocolate use varying amounts of these 3 ingredients.,Picture of the Cacao Tree,History of Chocolate,Dates back to about 1,500 years ago. First found in Mayan and Aztec Civilizations. Mayans used cacao beans to create a cold, unsweetened, spicy chocolate beverage. This was the first form of chocolate. Aztecs came across cacao beans through trade. They named the spicy drink xocolatl (bitter water). Cacao beans played important roles in both Mayan and Aztec Civilizations.,The chocolate drink was first brought to Europe by Spanish conquistador, Hernan Cortes. The drink was sweetened to match European tastes. The drink spread from Spanish courts to other European courts. The drink was also prescribed to people for depression and used in love and death potions. In the late 18th century French and Dutch processors experimented with chocolate liquid. This lead to the production of chocolate powder, which then led to the production of the first solid chocolate. The first solid chocolate was believed to have been sold in England in the mid-1800s.,,Chocolate as we know it today was largely made possible by three events ,In 1828, Dutch chemist Johannes Van Houten, invented a method of extracting the fat or cocoa butter from ground cocoa beans. The resulting cocoa powder was much less bitter tasting and, when combined with sugar or honey, made a drink much more palatable to our taste. This process known as the Van Houten process made it possible for Fry & Sons of Bristol, England to manufacture and sell the first solid chocolate bar in 1847. In 1875 a Swiss manufacturer, Daniel Peters also used the Van Houten process to successfully combine chocolate with powdered milk to produce the first milk chocolate.,Types of Chocolate,Sweet Chocolate Contains no milk solids Cannot contain less than 15% chocolate liquor Dark Bittersweet Chocolate Contains the most chocolate liquor. It is sweet chocolate that cannot contain less than 35% chocolate liquor. Semi Sweet Chocolate Similar to dark bittersweet chocolate. Baking Chocolate Contains no sweeteners and no milk.,Types of Chocolate,Milk Chocolate Contains milk and sugar, which differs from bittersweet and semisweet chocolate. Cannot contain less than 12% milk and cannot contain less than 10% chocolate liquor. Can contain other ingredients but must comply(遵守)with regulations. White Chocolate Technically not real chocolate Contains no chocolate liquor, which is one of the main ingredients in chocolate. Its made of cocoa butter, milk, and sugar.,Dark Chocolate,White Chocolate,Milk Chocolate,Nut Chocolate,Spearmint Chocolate,Liqueur Chocolate,Cartoon Chocolate,Mix Mix Chocolate,Home-made Chocolate,How Chocolate is Made,Cocoa pods（可可豆荚）are harvested Pods are crushed（压碎）and fermented（发酵）. Cocoa beans are taken out of the pods and then dried. Beans are roasted, graded, and then ground. Grinding（磨碎）the beans creates a liquid called chocolate liquor. Chocolate liquor - made mostly of fat called cocoa butter.,Cocoa butter is extracted（萃取）. Cocoa powder is also created when beans are ground. The process creates chocolate liquor, cocoa powder, and cocoa butter. Ingredients are blended(混合)back together to create different kinds of chocolates.,Potential Health Benefits,Chocolate may be good for the heart. Chocolate contains chemicals like those found in red wine and green tea. Helps improve circulation Helps cut down blood pressure Chocolate contains flavanols.(黄烷醇) Helps in preventing the oxidations(氧化)of “bad” cholesterol(胆固醇), which reduces the stickiness of blood platelets(血小板)and improve blood vessel(血管)elasticity(弹性). Theobromine, found in chocolate, was found to treat coughs better than codeine.,Chocolate Facts,Chocolate Consumption: Americans consume over 3.1 billion pounds of chocolate every year, which is about 11.7 pounds per person. Milk Chocolate is the most popular among Americans, followed by dark chocolate and then white chocolate. Chocolate is considered a mood food. Contains an amino acid called L-tryptophan. This increases serotonin in the brain, which is a calming hormone. Said to be natures own “antidepressant.”,,Chocolate Myths and Truths,Myth: Causes acne. Myth: High in cholesterol. Myth: Causes tooth decay. Myth: High in caffeine. Myth: Causes weight gain. Myth: Is addictive.,Truth: Studies found no connection between eating chocolate and acne. Truth: Chocolate is low in cholesterol and low in animal fat. Truth: Studies found that tooth decay is not as big of a problem as once thought. Tooth decay is mostly caused by poor hygiene. Truth: Chocolate is not high in caffeine and contains less caffeine than coffee. Truth: When eaten in moderation, chocolate does not cause weight gain。