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You may think the fresh cookies you bake at home are actually a relatively simple recipe but this video from TedEd shows otherwise.
It examines the science of exactly what happens when you close your oven door ready for them to rise.
When you add your cookies to the oven a series of chemical reactions that place that most of us are completely unaware of.
This video looks at the emulsions, caramelization and the tasty maillard reaction that takes place when baking cookies.