What is this close-up picture? (WotsThat: Bread crust)

Question

What object is shown in this zoomed-in close-up photo?

ThornPetal · Accepted Answer

Bread crust. Bread crusts develop their golden-brown color and crispy texture through the Maillard reaction, a chemical process that happens when heat transforms proteins and sugars on the dough's surface. This same reaction is responsible for the delicious flavors in roasted coffee, seared meat, and caramelized onions.

Answer: Bread crust

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