Name: Of Testing Milk
Ingredients: 1 teaspoon arrowroot; ¾ pint artificial water

Of Testing Milk

Ingredients

1 teaspoon arrowroot
¾ pint artificial water

Directions

Mix 1 teaspoon of arrowroot with ¾ pint of artificial water to create a decoction.
Use this mixture to dilute poor quality milk for the whole day's supply.
For more severe cases, increase the arrowroot to 2 teaspoons.

Recipe from a historical cookbook (Internet Archive).

Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.