Active learning ideas
Food science explores the 'why' behind cooking. This topic focuses on the functional properties of carbohydrates: gelatinisation, dextrinisation, and caramelisation. Students investigate how starch and sugar react to heat, moisture, and agitation. Understanding these processes is essential for mastering culinary techniques, from thickening sauces to achieving the perfect crust on bread.
Activity 01
Groups test different starches (cornflour, potato starch, plain flour) to see which creates the best viscosity at varying temperatures. They record observations and present their 'ideal' starch for a specific local dish like Lor Mee.
What is the difference between gelatinisation and dextrinisation?
Activity 02
One station focuses on caramelising sugar, another on dextrinising bread in a toaster, and a third on boiling starch. Students identify the differences in smell, color, and taste at each station.
How does temperature affect sugar during caramelisation?
Activity 03
Students are given a scenario of a failed white sauce. They must individually identify the scientific error (e.g., adding boiling water too fast), discuss with a partner, and then share the 'fix' with the class.
Why do starches thicken liquids?
A few notes on teaching this unit
Watch Out for These Misconceptions
Caramelisation and the Maillard reaction are the same thing.
Students often confuse these because both cause browning. Through hands-on modeling, clarify that caramelisation involves only sugar, while the Maillard reaction requires both protein and reducing sugars.
Gelatinisation happens as soon as starch touches water.
Many believe the reaction is instant. By observing a starch slurry as it heats, students see that a specific temperature (the gelatinisation point) must be reached before the granules swell and thicken the liquid.
Methods used in this brief
Protein Coagulation and Denaturation
Students will examine the physical and chemical changes in proteins during food preparation. The focus will be on denaturation, coagulation, and the Maillard reaction.
8 methodologies
Fats and Emulsions
This topic explores the properties of fats and oils, including plasticity, shortening, and emulsification. Students will learn how emulsifiers stabilise mixtures.
8 methodologies