Wash fruit. (Any type of pear will do - I use Bosc or Bartlett).
Cut pears in half and remove seeds and stem. Cut each half into 6 pieces.
Put pear and water into a large pot. Turn the burner on high and cover with a lid.
Once the mixture comes to a boil, turn heat down to low and simmer, covered, for 20-30 minutes, stirring occasionally until the pears are soft and can be pureed.
Blend in a blender, puree until smooth.
Pour into ice cube trays, allow to cool, wrap/cover, and freeze.
Thaw in the fridge the night before use, or thaw by putting the ice cube in a bowl over a bowl of hot water on the counter to defrost.