27 June 2008

Baking Theory Notes: Cake Baking and Ingredients 6

It all started as...
----->Bread dough enriched with butter and spices, leavened with yeast and air was whipped into the dough.

----->ca. 1837 : Baking Powder revolutionizes cake industry (allows for consistent leavening)




moist coconut cake by babe_kl


Characteristics of Cakes:

*Pound / White / Yellow

  • Batter - high ratio cake (fats) , Chemical leavened.


*Angel Food


  • Foam - Air leavened, uses whipped egg.


*Chiffon

  • Combo of Batter & Foam - whipped eggs added to batter


Ingredients:

  1. tenderizers
  2. moisteners
  3. flavorers

*Flours Used in Cake baking
  • Mainly cake flour (7-9% protein, soft milled)
  • Can use AP, Pastry,
Why Specific Protein Count needed, how it forms Gluten Structure:
  1. Bleached flour (has carotenes taken out)
  2. Flours are Made with Matured Wheat - if using a heavier protein percentage (i.e in bread flour etc, will cause cake structure to become dense, unstable and collapse into it's self.
  3. Moisture content comes from the flour

*Sugars Used in Cake Baking

What sugar does for cakes:
  1. Acts as a Sweetener
  2. Extends the shelf life of the cake
  3. Aides in creaming (process of whipping air into the batter)
  4. Gives cake crust it's color
  5. Spreading action (the process of melting during bake off)



Related Posts:






23 August 2007

Baking Theory Notes: Fermentation Chemistry 4

Fermentation

Remember: Fermentation starts when the mixer stops!


Control Fermentation through:

  1. Temperature
  2. Time
What happens during the fermentation process?
  • Gas is produced --> Carbon Dioxide {When Dough is mixed gas is caught by the gluten and the gas rises}
  • (water & flour cause enzyme activation)
  • Gluten is modified --> Dough becomes balanced so dough is workable : Elasticity --> Extendability
  • Flavor is developed (Acidity)
  • Alcohol is developed ("Alcoholic fermentation")
*To test the "alcoholic fermentation" theory ---> when you are ready to mix your formula, open a starter, either one retarded or left on the bench (Ciabatta or Croissant are especially potent!), lean in --- (as a former instructor would explain: "you rip back- because alcohol has hit your brain", he had such a big grin when he said this ) I am telling you --- it'll knock your socks off. The more "bake-tarded" (my own baker slang) you become, the more you anticipate smelling those starters! Ha HA!



Enzymes:

fermentation chemistry simplified
click here to see a bigger sized diagram of the chemical changes of fermentation.

Definition:
Biochemical Catylist: an organic substance formed by living cells (yeast), is able to cause changes in other substances {i.e bacteria, fungus or both } without changing it's self .

yeast cell budding



Diastatic = has enzymes
Non-diastatic = enzymes have been killed

Diastic Enzymes:

---> Supplied by flour / or Malt (sugar)
  1. Alpha-Amalase works on Amylose ---> Converted to Dextrin (sugar)
  2. Beta-Amalase works on Amylopectin ---> Converted to Maltose (sugar)
*These diastic enzymes are important because they work on STARCH.
---> Wheat is 70% starch (bran is protein)

Starch:

--->Amylose --->
--->Amylopectin--->

Diastatic Enzymes from flour (from milling) work on the damaged starch (i.e gelatinized (from heat / baking) and convert it to sugar (2% of starches) .

End result is mostly Maltose. Yeast cannot metabolize maltose.

  1. Maltase (enzyme) ---> converts to Fructose, Dextrose / Glucose)
  2. Sucrose [beet or cane] (granulated sugar) ---> Converts into Glucose
  3. Invertase (enzyme from yeast) ---> converts Glucose into Sucrose

Yeast takes maltose (enzyme) and converts it into Fructose, Dextrose / Glucose {allows yeast to eat it).

These processes take place if:
  1. Optimal Temperature
  2. Right moisture Content
  3. Allowed Optimal time
Zymase (yeast) ---> Reacts with simple sugars and injects CO2 into the dough causing it to rise. Produces alcohol.

Simple Sugars:
  1. Fructose = CO2
  2. Glucose = CO2
  3. Dextrose = CO2
Proteolytic Enzymes
  1. All from flour
  2. Can be found with Diastatic Enzymes
---> Protease ---> Converts protein ---> Modifies the gluten so dough is workable (softens and makes extendable)

*Over mixing dough will break dough down into "slime". I've seen this happen, it ain't pretty. Kinda resembles the stay puff marshmallow man (as the ghostbusters cross streams)
when he is obliterated --- a bumpy, jiggly white mass. yuck.

28 May 2005

Baking theory Notes: Chemical leavening; Dough strengthener; Crumb softeners 0

Chemical leavening

  1. Reaction of Sodium bicarbonate (baking Soda) & An Acid
  2. [Acid + Salt + Water = Carbon dioxide gas]
  3. Baking Powder is this Formula plus a filler to retard reaction.
  1. Double Acting Baking Powder is 2 acids

- Substances that react like acids:

  1. [buttermilk]
  2. [chocolate] { kill reaction (rise) made by baking soda, that is why these are commonly used in cookie formulas}
  3. [lemon/citrus juice] { kill reaction (rise) made by baking soda, that is why these are commonly used in cookie formulas}

Dough strengthener

  1. Eggs
  2. Ascorbic Acid (vitamin C) [only additive allowed in European Production of Baguettes/French bread]
  3. Potassium Bromate ---> {outlawed in most countries , NOT the U.S} carcinogenic = causes cancer
Basic formula for bread {100% flour + 60% water + 2% salt + 2% yeast)

Crumb Softeners {click here for more info}

Function:
Surfactants, through complexly with flour protein(gluten) break the surface tension between non mixable substances.

  1. Give longer shelf life in bread [yeast raised products]
  2. emulsifier & surfactants retard the Staling.

Two ways of Staling
  1. starch molecules change & become rigid
  2. loose moisture in product becomes dry.

28 March 2005

Baking Theory: Dough Preparation & Fermentation 4

Steps as a Successful Baker :

- Have Balanced Formulas

--- A collection of formulas that work
--- Formulas you have tried out in your bakery & changed to suit your needs
--- Be a Control Freak
--- Have Consistency every time!
--- Know Functions of Ingredients in your formulas, so as to predict the outcome.

-Know Proper Mixing

[1st speed]

--- Remember your Goal is Consistency
--- know that To Control consistency, hold back water.
--- Know NEVER to control mix with flour!

--> Gluten Development

[
2nd speed]

--- know Proper gluten development VERY important, if dough is mixed too long gluten will separate.


*know your 3 main types of mix:

[Short ] {uneven gluten, tears window}

Uneven Window


[Intensive] { not quite a window, small tears}

[Improved] {fully developed window, feels like skin}

Fully Developed Window




{To check for the development of your dough :
  1. Stop mixer, tug on a piece of dough {always from the bottom, due to more consistent mix} You will feel an elastic feel the longer you mix.
  2. Take out the piece of dough. Start pulling from the bottom of your dough piece Until it is very thin in the middle & forms a window. Let the dough get pliable in your hands -- do not force the stretch.
  3. Hold on sides, & hold up the "window" to the light. You will see the gluten will form "strands" criss-crossing in your dough like a crude mesh , as it starts to develop.
  4. Gently touch with a finger - if it is taught, the dough is ready for the next step}


- Know Fermentation

{note :
artisan bread doughs have longer fermentation}

--- Longer fermentation means shorter mixing.
--- Gluten is modified {Acidity = Flavor}

[ Dough Temperature] [completion of mixing]
{ Best environment for fermentation is 50°F & 80% humidity. Dough doesn't ferment well under 40° F}

---78°F - 84°F [can be as low as 74°F]
---If you lower temp. fermentation slows
---If temp is raised fermentation speeds up.
---Remember cool doughs make for the best fermentation.

[ the process of Fermentation ] [alcoholic fermentation starts]

---Remember fermentation starts as soon as mixer stops.
---This is the MOST important part of bread making
---Gluten is biochemically modified
---improved stretchability
---improved elasticity
---Carbon dioxide gas is produced
---Acidity

-When Scaling out dough

{an efficient experienced baker can handle 8 gal at a time}

---You should never scale out more dough than you can handle in 15-20 minutes. Or dough will ferment further while sitting & product will be nonuniform[larger] .

-Tips for Rounding & Shaping

{ Additional Gluten development = mix + folding (bench work) }

---Pre-shaping
---Cover after pre-shape or "crust" will develop

- Intermediate Proof or Bench Time

---The time when dough has been rounded & now resting under plastic.

- Molding & Shaping

---Flatten dough rounds out to expel gas
---Shape into final loaf

- Panning

Mise en place :

---boards
---Strap pans
---Serrated sheet pans

{ seams must be bottom down to prevent splitting of loaf while baking}

-Proofing

---Put into a Proof Box, steamer.
---Almost the last fermentation.
---95°F -98°F , 80% humidity
---Proof according to product
---don't let dry out
---Touch

{Finger imprint test

  1. Lightly tap the top of a loaf in the proofer-- Finger should stay imprinted in dough if proofed enough
  2. If proofed too long/not enough you can't repair dough.
  3. Over proofed dough can be put into a hotter oven to try & kill yeast immediately. To save product}










26 January 2005

Baking Theory Notes: Fats 0

Fats:


Clarified Butter By Chiot's Run



Fat added to yeast dough lubricates



+Lard

  1. Hog fat or other animal fat.

+Molecular Modified Lard

  1. deodorized
  2. consistency is changed
  3. High Plasticity range
  4. Good for pastry

+Standard Shortening

  1. Original Blend
  2. hard oils + soft fats
  3. Animal fats + Vegetable Fats
  4. Not hydrogenated

+Hydrogenated Shortening
[end result is Trans fat = solid fats higher in fatty acid.]
  1. Chemically altered
  2. saturated with hydrogen
  3. Hydrogen atoms attach to fat molecules, become stable [firm]
  4. Made up of vegetable oils [ example ---palm, soybeans, rabeseed, canola]
  5. vegetable oil alone is harder to use
  6. harder to store, turns rancid quickly.
  7. final product = better storage
  8. Easier to build plasticity


+Fluid Shortening

  1. Made from Tropical oils or mutton fat.
  2. Combo of oil + hard fats + emulsifiers
  3. Sold in a tin can.

+Emulsified Shortening Added to bread it aided in the shelf life, inhibits the staling process.


Mono- & Di-glycerides = Surfactant
  • A Surfactant enables you to mix un-mixable compounds
  • A Surfactant lowers the surface tension of whatever solvent you add it to.
  • Surfactant, if used , can cause you to add a higher percentage of sugar than the formula calls for. You don't want that!
High Ratio Shortening
  • Used in Cake batter, which is an Emulsion



+ High Ratio Shortening

  1. mostly used in cakes


+Margarine

  1. 80% fat + emulsifiers + color + water

+Baker's Margarine*
*Must be right percentage of fat content, or fat will not melt in mouth! Pastry texture suffers.
  1. Higher melting point
  2. Colorless
  3. High Plasticity

+Roll-in Margarine*
*Must be right percentage of fat content, or fat will not melt in mouth! Pastry texture suffers.
  1. used for pastry [puff, Danish]



+Butter
** With Use of butter ---charge per pastry increases, Labor increases
  1. 80 - 81% Butter Fat
  2. 14% water
  3. additives:
+ milk solids
+ minerals

  • Low melting point
  • Gives lot's of Flavor
  • Low Plasticity

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