01 -
Mix milk, sugar, and salt in heavy pan. Heat to gentle simmer, stirring until sugar dissolves.
02 -
Lower heat. Cook uncovered without whisking, just occasional stirring of bottom. About 30-45 minutes.
03 -
Should reduce by half and look like maple syrup. Add vanilla.
04 -
Pour through strainer if there's foam or solids. Let cool completely.
05 -
Keep in sealed container in fridge up to 1 month. Warm briefly to make pourable again.