Course · Science & cooking

Kitchen Science: What Makes Food Delicious

The chemistry and physics of cooking: the Maillard reaction, protein, dough and yeast, flavor balance, emulsions — why food turns out well (or doesn't).

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PepelenCourse author

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Unit 1. Heat: the Maillard reaction and caramelization

Lesson 1. Where the flavor of browning comes from

6 exercises · Understand that a brown crust and the aroma of browning are chemistry (the Maillard reaction), and under what conditions it starts.

Lesson 2. Caramelization: sugar on its own

7 exercises · Tell caramelization (the breakdown of sugar) apart from the Maillard reaction and understand why sweet things burn so easily.

Lesson 3. Dry and hot: how to control the crust

5 exercises · Apply the “remove the water, add heat” principle in practice and understand the role of salt, oil, and crowding in the pan.

Unit 2. Protein: meat and eggs under heat

Lesson 1. Denaturation: what heat does to protein

6 exercises · Understand that cooking protein foods means denaturing protein, and why overcooked food turns dry and tough.

Lesson 2. Internal temperature: the kitchen's most important tool

6 exercises · Remember that doneness is determined by internal temperature, not time, and know the reference points for eggs and meat.

Lesson 3. Salt, brine, and juiciness

5 exercises · Understand how salt works on meat (it draws out moisture, then helps hold it in) and what dry and wet brining are.

Unit 3. Dough: gluten, yeast, and leaveners

Lesson 1. Gluten: the framework of dough

6 exercises · Understand what gluten is, how it forms during kneading, and why its development needs to be controlled (a lot for bread, little for tender baked goods).

Lesson 2. What makes baked goods rise: gas

6 exercises · Understand that dough rises because of gas bubbles held in a framework, and tell apart three ways to produce them: yeast, baking soda, and baking powder.

Lesson 3. Yeast: a living leavener under control

6 exercises · Understand that yeast is alive and learn to control it through temperature and time, without killing it or overproofing the dough.

Unit 4. Flavor and balance: salt, acid, fat, umami

Lesson 1. The five tastes and the role of salt

5 exercises · Know the five basic tastes and understand why salt doesn't just taste salty but also enhances other tastes and tones down bitterness.

Lesson 2. Acid and fat: contrast and richness

6 exercises · Understand how acid freshens and balances fatty and sweet foods, while fat carries flavor and softens heat.

Lesson 3. Umami: the fifth taste, the taste of depth

5 exercises · Understand what umami is, which foods provide it, and why it makes a dish “deep” and satisfying.

Unit 5. Emulsions and sauces: mixing the unmixable

Lesson 1. Emulsion: oil and water in one jar

6 exercises · Understand what an emulsion is and why you need an emulsifier to combine oil and water, which don't mix on their own.

Lesson 2. How not to break a sauce (and how to save it)

5 exercises · Understand why an emulsion separates, how to prevent it, and how to “fix” a broken mayonnaise or sauce.

Lesson 3. Vinaigrette and other sauces

5 exercises · Understand the difference between a stable and a temporary emulsion, and how thickeners help bind and thicken sauces.

Unit 6. Fixing mistakes: the top kitchen fails

Lesson 1. Protein and heat fails

6 exercises · Be able to identify, from the symptom, the cause of common failures with meat, eggs, and crust, and connect it to its mechanism.

Lesson 2. Dough and flavor fails

5 exercises · Connect common baking and flavor failures with their mechanisms (gluten, gas, balance) and know what to do.

Unit 7. Wrap-up: thinking like a kitchen scientist

Lesson 1. The big picture: seven principles

6 exercises · Bring all of the course's mechanisms together into one system and learn to apply them to new, unfamiliar situations in the kitchen.