S UGAR. W HAT I T I S Energy for all living things In its simplest form, glucose, sugar is the building blocks for all carbohydrates and provides the.

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Presentation transcript:

S UGAR

W HAT I T I S Energy for all living things In its simplest form, glucose, sugar is the building blocks for all carbohydrates and provides the sugary flavor in highly refined sweeteners like corn syrup Glucose + Glucose = Maltose (used for fermentation of beer) Glucose + Galactose = Lactose (milk sugar) Glucose + Fructose = Sucrose (sugar refined from cane sugar and sugar beets)

H ISTORY The major source of sugar is sugar cane Extracting juices from sugar cane and then boiling it into a dark syrup (molasses) and a mass of crystal (sugar) was being practiced in India before 550 BCE By 100 BCE, sugar was used in medicinal products After the 11 th century, sugar trade spread throughout Europe where it was used mainly in candying flowers and fruits and sugaring medicine to make it more palatable 15 th Century – art of confectionary is used world wide

H ISTORY 18 th Century – sugar becomes widely available from sugar plantations in the West Indies In England, sugar consumption rose from 4lbs in 1700 to 12 lbs in 1780 An estimated 13 million enslaved Africans are working in the sugar industry 1800 – Every European country had outlawed slavery in its colonies and the West Indies sugar industry collapses 1840 – flourishing sugar-beet industry in Northern Europe Andreas Marggraf develops a method for extracting sugar from white beets (sugar beets) Today, 30% of the sugar comes from sugar beets and 65% come from sugar cane

S UGAR P ROCESSING Sugar cane is very perishable and must be processed immediately after harvest so it is produced in two stages: First, it is boiled, crushed and crystallized into unrefined raw sugar near the cane plantation Second, it is shipped to factories for refining

R EFINEMENT For Raw Sugar Milling the beet or cane is washed, shredded and rolled to extract juice Clarification The juice is mixed with calcium hydroxide to raise its pH to 7 This keeps acid in the juice from breaking the sucrose into glucose and fructose molecules It is heated gently to coagulate the proteins, which are removed Concentration The clarified juice is heated gently in shallow pans until the sucrose concentration in the syrup is around 60% It is placed in a vacuum chamber to remove 10% more water

R EFINEMENT For Raw Sugar Crystallization The syrup is seeded with sugar crystals and cooled, causing the sucrose in the syrup to form coarse golden hued crystals coated with thick brown syrup Centrifuging A centrifuge draws the molasses off the crystals to produce “first” molasses and raw sugar The molasses is mixed with a saturated syrup and crystallized again to produce a “second” molasses A third crystallization can produce a harsh flavored, tarry blackstrap molasses

R EFINEMENT For Refined Sugar Affination Raw sugar is mixed with sugar syrup and centrifuged to remove any lingering bits of molasses Clarification The cleaned sugar is heated with water into a supersaturated solution and then mixed with calcium hydroxide and carbon dioxide to absorb impurities in the sugar Decolorization The clarified syrup is filtered through activated charcoal to remove any lingering color

R EFINEMENT For Refined Sugar Crystallization The purified syrup is heated to supersaturation, and then recrystallized and vacuum evaporated to produce white sugar Drying The refined sugar crystals are air-dried to produce granulated sugar that won’t clump

F ORMS White Sugar (from largest – smallest) Rock SugarCrystal Sugar Sanding Sugar Preserving Sugar Granulated Sugar Colored and Flavored Sugar Superfine Sugar Confectioners Sugar

R OCK S UGAR Large sugar crystals made by crystallizing a supersaturated sucrose solution around a large nucleon site, such as a string to produce chunky crystals 5 mm in length

C RYSTAL S UGAR Large crystals about 4 times the size of granulated sugar Used for decorating confections and baked goods. 2 mm in length

S ANDING S UGAR Large crystals, washed with alcohol to remove dust Used for making super clear syrups and perfectly white icings Commonly sprinkled on cookies and doughnuts 1 mm in length

P RESERVING S UGAR Large crystals made from highly refined sugar treated to dissolve easily Used for making jams, jellies, and preserves 1 mm in length

G RANULATED S UGAR Medium sized An all-purpose sugar 0.5 mm in length

C OLORED AND F LAVORED S UGAR Crystal or granulated sugar that is colored with food coloring and flavored with ground spices, flower petals, or citrus zest or infused with aromatic oils from cinnamon and vanilla Used to decorate and flavor confections, baked goods and beverages

S UPERFINE S UGAR Finely ground granulated sugar for smooth mouth feel 0.1 mm in length

C ONFECTIONER S UGAR Very finely crushed granulated sugar, mixed with about 3% starch to prevent clumping 0.01 mm in length

B ROWN S UGARS Can be raw or refined crystals that are coated with some of the dark syrup that is extracted during processing (from least refined to most) Demerara Sugar Muscovado Sugar Sucanat Sugar Turbinado Sugar Brown Sugar

D EMERARA S UGAR Sugar crystals taken from the first crystallization of light cane juice The crystals are large, golden and slightly cracked

M USCOVADO S UGAR Sugar crystals taken from the final crystallization of cane syrup into blackstrap molasses The crystals are dark brown, small, strongly flavored and sticky

S UCANAT A trademark raw sugar made by evaporating juices to create a granular rather than a crystalline texture

T URBINADO S UGAR Demerara sugar washed of some of its molasses so it’s not sticky.

B ROWN S UGAR Refined white sugar that is either soaked in molasses syrup and recrystallized or thinly coated with molasses. The more molasses the darker the sugar.

R EFINED S UGAR FROM OTHER P LANTS Crystallized from sugar palm sap It can be unrefined or refined A complex sugar derived from any one of numerous vegetables, mostly legumes. It is about a quarter as sweet as sucrose and has some thickening abilities. It is mostly used industrially as a bulk sweetener. Palm Sugar Stachyose Sugar

W HAT I T D OES In baking: Sugar impedes to coagulation of proteins, tenderizing doughs and pastries by interfering with gluten formation, It protects custard and pastry cream from curdling Sugar is both hydroscopic and hydrophilic resulting in moist baked goods Hydroscopic - it absorbs water from its environment Hydrophilic - it bonds with water and holds on to it Example: the hydrophilic quality of molasses is also what makes brown sugar moist – brown sugar will dry out and become hard when exposed to air – by wrapping it in a damp towel it will soften up right away