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Heat Transfer

• Natural (rising and falling air)
• Mechanical (fans)

• Radiation: energy is transferred by waves of heat
• Infrared
• Microwave

Chef Michael Scott
Lead Chef Instructor AESCA
Boulder

• Conduction: movement of heat from item to another through
direct contact
• Convection: transfer of a heat through a fluid (liquid or gas)
Effects of heat
• Coagulation: protein chains denature and rebond

• Gelatinization: starch granules absorb water
• Caramelization: cooking sugars properly
• Maillard reaction: sugar breaking down in the presence of
protein (338F)

• Water evaporates: foods dry during cooking
• Fats melt: will not evaporate

Chef Michael Scott
Lead Chef Instructor AESCA
Boulder

• Irreversible transformation into a solid state
• Begins around 140F
Cooking methods
• Air
• Fat

• Moist heat
• Water
• Steam

• Combination

Chef Michael Scott
Lead Chef Instructor AESCA
Boulder

• Dry heat
•
•
•
•

Broiling: radiant heat from above
Grilling: radiant heat from below
Roasting and Baking: surrounded by hot air
Sauteeing (to jump): conduction heat transfer from a hot pan
to food with fat
• Pan fry
• Stir fry

• Pan Frying: conduction cooking using a “moderate amount of
fat”
• Deep Frying: cooking fully submerged in fat using convection
• Recovery times for fryers

Chef Michael Scott
Lead Chef Instructor AESCA
Boulder

Dry heat methods
Moist heat methods
• Poaching: cooked in a liquid using convection heat transfer

• Simmering: 185 to 205F (different at altitude)
• Boiling: 212F at sea level (202F in Boulder)
• Temperature drops 2F for every 1000ft

• Steaming: convection cooking using steaming

Chef Michael Scott
Lead Chef Instructor AESCA
Boulder

• 160 to 180F (slight movement)
• Court bouillon
• Shallow poaching (cuisson)
Combination methods
• Braising:

• Stewing:
• Smaller pieces of food
• Fully submerged in liquid

Chef Michael Scott
Lead Chef Instructor AESCA
Boulder

• Searing
• Saute
• Simmering and steaming

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15 heat and cooking

  • 1. Heat Transfer • Natural (rising and falling air) • Mechanical (fans) • Radiation: energy is transferred by waves of heat • Infrared • Microwave Chef Michael Scott Lead Chef Instructor AESCA Boulder • Conduction: movement of heat from item to another through direct contact • Convection: transfer of a heat through a fluid (liquid or gas)
  • 2. Effects of heat • Coagulation: protein chains denature and rebond • Gelatinization: starch granules absorb water • Caramelization: cooking sugars properly • Maillard reaction: sugar breaking down in the presence of protein (338F) • Water evaporates: foods dry during cooking • Fats melt: will not evaporate Chef Michael Scott Lead Chef Instructor AESCA Boulder • Irreversible transformation into a solid state • Begins around 140F
  • 3. Cooking methods • Air • Fat • Moist heat • Water • Steam • Combination Chef Michael Scott Lead Chef Instructor AESCA Boulder • Dry heat
  • 4. • • • • Broiling: radiant heat from above Grilling: radiant heat from below Roasting and Baking: surrounded by hot air Sauteeing (to jump): conduction heat transfer from a hot pan to food with fat • Pan fry • Stir fry • Pan Frying: conduction cooking using a “moderate amount of fat” • Deep Frying: cooking fully submerged in fat using convection • Recovery times for fryers Chef Michael Scott Lead Chef Instructor AESCA Boulder Dry heat methods
  • 5. Moist heat methods • Poaching: cooked in a liquid using convection heat transfer • Simmering: 185 to 205F (different at altitude) • Boiling: 212F at sea level (202F in Boulder) • Temperature drops 2F for every 1000ft • Steaming: convection cooking using steaming Chef Michael Scott Lead Chef Instructor AESCA Boulder • 160 to 180F (slight movement) • Court bouillon • Shallow poaching (cuisson)
  • 6. Combination methods • Braising: • Stewing: • Smaller pieces of food • Fully submerged in liquid Chef Michael Scott Lead Chef Instructor AESCA Boulder • Searing • Saute • Simmering and steaming