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National Chemistry Week - Experiments - A Chemical Engineer’s Recipe for Chocolate Chip Cookies
Objective:
Household cooking involves chemistry. Here is a cooking experiment in which the product is edible.

Materials:

  • 236.6 cm3 (500 mL) partially hydrogenated tallow triglyceride (butter or margarine)
  • 177.45 cm3 (177 mL) crystalline sucrose (sugar)
  • 177.45 cm3 (177 mL) unrefined sucrose (brown sugar)
  • 4.9 cm3 (5 mL) 4-hydroxy-3-methoxybenzaldehyde (vanilla)
  • 2 calcium carbonate-encapsulated avian albumen-coated protein (eggs)
  • 532.35 cm3 (500 mL) gluten (flour)
  • 4.9 cm3 (5 mL) sodium chloride (salt)
  • 4.9 cm3 (5 mL) sodium bicarbonate (baking soda)
  • 1 package of theobroma cacao (chocolate chips)
  • 236.6 cm3 (250 mL) chopped de-encapsulated legume meats (nuts)
  • measuring spoons
  • measuring cups
  • mixing bowls
  • cookie sheets

Procedure:

  1. Cream the partially hydrogenated tallow triglyceride, methyl ether of protocatechuic aldehyde, crystalline and unrefined sucrose in a bowl.
  2. Add the calcium carbonate-encapsulated avian albumen-coated proteins and mix well.
  3. In a separate bowl combine the gluten, sodium chloride, and sodium bicarbonate. Add to creamed mixture.
  4. Stir in theobroma cacao and de-encapsulated legume meats.
  5. Place the final mixture piecemeal onto a cookie sheet.
  6. Heat in an 463 K (190°C/ 375°F) oven for 8-10 minutes and allow the chemical reactions to take place.
  7. Remove from oven and place on cooling rack.
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