How to Make Powder From Eggshells

Eggshells are a potent source of calcium.
Eggshells are a potent source of calcium. (Image: Photodisc/Photodisc/Getty Images)

Eggs are loaded with protein and decidedly versatile for cooking and baking. Eggshells contain large amounts of calcium. Eggshell powder can be used as a calcium supplement for humans and pets. In addition, you can use it as a face or body powder. You can also create chalk by mixing the powder with flour and water, forming the resulting paste into sticks and allowing them to dry. Though eggshell powder is available commercially, you can also make your own.

Things You'll Need

  • Food processor, blender or coffee grinder
  • Cookie sheet or baking pan

Wash eggshells out after you have emptied them, then save them for no more than a week. You will not want to use eggshells that you have stored for longer than a week.

Heat the oven to 350 degrees Fahrenheit.

Place the shells on a cookie sheet or baking pan and put them in the oven for eight to 10 minutes. This will make them brittle and ready to grind.

Grind the shells in the food processor, blender or coffee grinder until they turn to a fine powder.

Place the powder in a jar and keep it refrigerated for up to a year.

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