Key Formulas & Frameworks
Brunoise: 3mm × 3mm × 3mm | Macédoine: 5mm × 5mm × 5mm
Julienne: 3mm × 3mm × 3cm | Batonnet: 6mm × 6mm × 5cm
Paysanne: 1cm × 1cm × 3mm | Chiffonade: finely shredded herbs
Uniform cuts ensure even cooking and professional presentation
Beef/Lamb: Rare 52°C | Medium-Rare 57°C | Medium 63°C | Medium-Well 66°C | Well-Done 71°C
Pork: 63°C (medium) | 71°C (well-done)
Poultry: 74°C (165°F) | Fish: 63°C (145°F)
Carryover cooking: temperature rises 3-5°C after removal from heat
Flour = 100% (always)
Water = 60-70% | Yeast = 1-2% | Salt = 1.5-2% | Fat = 2-5%
All ingredients expressed as percentage of total flour weight
Béchamel: Roux + Milk | Velouté: Roux + White Stock
Espagnole: Roux + Brown Stock + Tomato | Tomate: Tomatoes + Roux
Hollandaise: Egg Yolks + Butter + Lemon | Mayonnaise: Oil + Egg Yolk
All classical French sauces derive from these five
Sweet + Sour + Salty + Bitter + Umami = Balanced Flavor
Fat carries flavor | Acid brightens | Salt enhances | Heat contrasts
Preparation + Organization + Planning = Efficient Cooking
Everything in its place: ingredients measured, equipment ready, station organized
4°C – 60°C (40°F – 140°F): Bacteria multiply rapidly
Hot holding: > 60°C (140°F) | Cold holding: < 4°C (40°F)
Two-hour rule: discard food in danger zone > 2 hours (1 hour if above 32°C/90°F)
Bouquet Garni: Thyme, parsley, bay leaf (sachet)
Mirepoix: Onion, carrot, celery (2:1:1 ratio)
Flavor foundations for stocks, soups, and braises
Core Concepts
Maillard Reaction and Caramelization
The Maillard reaction (140-165°C / 284-329°F) is a chemical reaction between amino acids and reducing sugars that produces browning and complex flavors (hundreds of flavor compounds). Responsible for: seared steak crust, bread crust, roasted coffee, chocolate, beer. Caramelization (170°C / 338°F) is the pyrolysis of sugar alone — simpler flavor profile. Both require dry heat; moisture inhibits browning (boiling = no Maillard).
Heat Transfer Methods
Conduction: Direct heat transfer through contact (pan to food). Convection: Heat transfer through moving air/liquid (oven, deep fryer). Radiation: Infrared waves (grill, broiler). Induction: Electromagnetic field heats pan directly. Understanding heat transfer is essential for choosing cooking methods: searing (conduction), roasting (convection), grilling (radiation), poaching (conduction through liquid).
Emulsions and Thickening Agents
Emulsions mix immiscible liquids (oil + water). Temporary: vinaigrette (shaken, separates). Permanent: mayonnaise (emulsifier: lecithin in egg yolk). Thickening agents: Roux (flour + fat), beurre manié (flour + butter), cornstarch slurry, egg yolks (coagulation), reduction (evaporation), gelatin (collagen). Each has specific applications, temperatures, and limitations.
Flavor Profiles and Taste Science
Five basic tastes: sweet (sugars), sour (acids), salty (sodium), bitter (alkaloids), umami (glutamate — savory). Flavor = taste + aroma (olfaction) + texture + temperature + trigeminal (spicy, cooling). Flavor pairing: shared compounds (chocolate + blue cheese), contrast (sweet + sour), regional traditions (Mediterranean: olive oil, garlic, lemon). Layering flavors: bloom spices in fat, deglaze, finish with fresh herbs.
Menu Engineering and Food Cost
Menu engineering classifies dishes by popularity and profitability: Stars (high popularity, high profit) — promote. Plowhorses (high popularity, low profit) — reduce cost or increase price. Puzzles (low popularity, high profit) — promote or reposition. Dogs (low popularity, low profit) — remove. Food cost percentage: (Ingredient cost ÷ Menu price) × 100%. Target: 28-35% for restaurants.
Plating and Presentation
Visual presentation affects taste perception. Principles: Odd numbers (3, 5, 7 items more appealing than even). Height (vertical dimension adds drama). Color contrast (varied colors stimulate appetite). Negative space (don't overcrowd plate). Sauce placement (under, over, or artistic drizzle). Garnish purpose (must be edible and relevant). Plate as canvas — chef as artist. Studies show beautifully plated food tastes better (Wansink).
Worked Examples & Case Studies
Example 1: Making a Classic Béchamel Sauce
Ingredients: 50g butter, 50g flour, 500ml whole milk, salt, white pepper, nutmeg.
Method: (1) Melt butter over medium heat. (2) Add flour, whisk continuously — cook roux 2-3 minutes (white roux — no color). (3) Gradually add cold milk, whisking constantly to prevent lumps. (4) Bring to simmer, cook 10-15 minutes until thickened (coats back of spoon). (5) Season with salt, white pepper, pinch of nutmeg.
Science: Roux (starch granules in fat) thickens via starch gelatinization (60-80°C). Milk proteins coagulate at 82°C — don't boil vigorously. Béchamel is base for: Mornay (+ cheese), Soubise (+ onions), Nantua (+ crayfish).
Example 2: Baker's Percentage Calculation
Recipe: 1kg bread flour, 650g water, 20g salt, 10g instant yeast.
Baker's Percentages: Flour = 100%. Water = 650 ÷ 1000 × 100 = 65%. Salt = 20 ÷ 1000 × 100 = 2%. Yeast = 10 ÷ 1000 × 100 = 1%.
Scaling: To make 2.5kg flour batch: Water = 2500 × 0.65 = 1,625g. Salt = 2500 × 0.02 = 50g. Yeast = 2500 × 0.01 = 25g.
Hydration: 65% hydration = medium-hydration dough (sandwich bread). Higher hydration (75%+) = artisan bread (ciabatta, baguette). Lower hydration (55-60%) = bagels, pretzels.
Example 3: Pan-Seared Steak — Maillard Reaction
Method: (1) Pat steak completely dry (moisture inhibits browning). (2) Season generously with salt and pepper. (3) Heat cast iron pan until smoking (260°C / 500°F). (4) Add high-smoke-point oil (avocado, grapeseed). (5) Sear steak 3-4 minutes per side without moving (develop crust). (6) Add butter, garlic, thyme — baste 1 minute. (7) Rest 5-10 minutes (redistribute juices).
Science: Dry surface + high heat = Maillard reaction (140-165°C). Crust forms via browning of amino acids + sugars. Resting allows muscle fibers to relax and reabsorb juices — cutting immediately loses 30% of juices. Internal temperature: 52°C rare, 57°C medium-rare, 63°C medium.
Case Study: Ferran Adrià and Molecular Gastronomy (elBulli)
Background: Ferran Adrià 's elBulli (Spain, 1964-2011) revolutionized cuisine through scientific techniques. Named world's best restaurant 5 times.
Innovations: (1) Spherification: Sodium alginate + calcium chloride creates liquid-filled spheres (caviar, ravioli). (2) Foams/Airs: Lecithin creates stable foams without fat. (3) Flash freezing: Liquid nitrogen (-196°C) for instant freezing, unique textures. (4) Deconstruction: Disassembling classic dishes into components (Spanish omelette as foam, liquid, and solid). (5) Sous vide: Vacuum-sealed precision temperature cooking. Impact: Transformed fine dining from tradition to innovation; influenced Heston Blumenthal, Grant Achatz, entire generation of chefs. Demonstrated cuisine as creative science.
Case Study: The French Culinary Revolution — Escoffier
Background: Auguste Escoffier (1846-1935) modernized French cuisine, creating the foundation of professional cooking.
Contributions: (1) Mother sauces: Systematized all sauces into five foundations. (2) Kitchen brigade: Hierarchical kitchen organization (chef, sous-chef, chefs de partie, commis) — still used today. (3) Menu simplification: Reduced excessive dishes to focused, seasonal menus. (4) Mise en place: Systematic preparation and organization. (5) Peach Melba: Created for Nellie Melba (1893). (6) Le Guide Culinaire: Comprehensive culinary reference. Impact: Transformed cooking from craft to profession; established classical French cuisine as global standard; his systems remain foundation of culinary education.
Practice Problems
Problem 1: What is the temperature danger zone? Why is it important?
Answer: 4°C – 60°C (40°F – 140°F). Bacteria multiply rapidly in this range. Food should be kept below 4°C (refrigeration) or above 60°C (hot holding). Two-hour rule: discard food in danger zone > 2 hours (1 hour if ambient temperature > 32°C/90°F).
Problem 2: What is the difference between caramelization and the Maillard reaction?
Answer: Caramelization: pyrolysis of sugar alone (170°C/338°F), simpler flavor profile. Maillard: reaction between amino acids and reducing sugars (140-165°C/284-329°F), produces hundreds of complex flavor compounds. Both create browning but through different chemical processes.
Problem 3: Calculate the food cost percentage: A dish costs $4.50 in ingredients and sells for $18.
Answer: Food Cost % = (4.50 ÷ 18) × 100 = 25%. This is excellent (target is 28-35%). Gross profit per dish = $13.50.
Problem 4: What are the five mother sauces? Name one derivative of each.
Answer: Béchamel (derivative: Mornay with cheese). Velouté (derivative: Allemande with egg yolk/cream). Espagnole (derivative: Demi-glace reduced). Tomate (derivative: Creole with peppers). Hollandaise (derivative: Béarnaise with tarragon).
Problem 5: What is mise en place? Why is it essential in professional kitchens?
Answer: Mise en place = "everything in its place." All ingredients measured, chopped, and organized before cooking begins. Essential because: (1) Prevents mistakes during service, (2) Ensures consistent quality, (3) Reduces stress and chaos, (4) Allows focus on technique and timing, (5) Professional standard — no chef cooks without it.
Problem 6: What is the difference between conduction, convection, and radiation in cooking?
Answer: Conduction: direct contact heat transfer (pan-searing steak). Convection: heat through moving air/liquid (oven roasting, deep-frying). Radiation: infrared waves (grilling, broiling). Each method produces different textures and flavors — understanding them allows proper technique selection.
Problem 7: What is spherification? What chemicals are used?
Answer: Spherification creates liquid-filled spheres resembling caviar. Chemicals: Sodium alginate (in liquid) + calcium chloride (in bath). Alginate reacts with calcium ions to form a thin gel membrane around liquid. Used in molecular gastronomy for "olive oil caviar," "yolk" spheres, etc.
Problem 8: Classify these menu items using menu engineering: A) High popularity, high profit. B) High popularity, low profit. C) Low popularity, high profit. D) Low popularity, low profit.
Answer: A = Star (promote, feature). B = Plowhorse (reduce cost or increase price). C = Puzzle (promote, reposition, rename). D = Dog (remove from menu).