Mix together the sugar, milk powder, and xanthan gum in a bowl.
In a saucepan, combine the light corn syrup and milk. Whisk until fully combined. Pour in the sugar mixture. Whisk vigorously, until sugar is dissolved.
Set the pot over medium heat and bring up just to a simmer, whisking occasionally. Remove from heat. Add the heavy cream and whisk to combine.
Pour the mixture into an airtight container and refrigerate until completely cooled, preferably overnight.
To make the pear puree, combine half of the cubed pears in a pot with 1/4 cup sugar, 1/2 cup water, cinnamon stick, and pinch of salt and nutmeg. Bring to a slow simmer and cook until the pears are very soft. Remove the cinnamon stick. Let cool completely.
Once cool, pour the mixture into a blender or chopper and blend until smooth. Transfer to an airtight container and refrigerate until ready to churn.
To make the candied pears, combine the remaining pears, water, and sugar in a pot over medium-low heat. Simmer on low for 20 minutes. Remove from heat, cover with a lid and cool for one hour. Transfer the mixture to a container and refrigerate until ready to churn.
Right before churning your ice cream, mix the pear puree and the ice cream base together. Pour into the ice cream maker and churn until the ice cream reaches soft serve stage.
Strain the candied pears from the sugar syrup and place them in a bowl to be ready to add them to the ice cream when it’s done.
Scoop half of the ice cream into a freezer container. Arrange half the candied pear pieces on top and cover with the remaining ice cream, then top with the remaining pear pieces, pressing them down into the top of the ice cream. Freeze until firm, at least 2 hours.