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Pre-heat precision cooker to 150 degrees.
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Add coffee and water to a quart size mason jar.
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Shake for 30 seconds.
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Once the precision cooker reaches 150 degrees add the mason jar to the water.
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Make sure the water comes to the base of the cap of the mason jar.
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Cook for 2 hours.
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After 2 hours strain the coffee through a sieve.
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Place in refrigerator until cold.
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Pour coffee over ice, add cream and sugar if desired.