Water Icing
Ingredients
Directions
In a bowl, combine icing sugar and tartaric acid.
Add boiling water gradually to form a soft paste.
Beat the mixture vigorously with a wooden spatula until well combined and smooth.
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.
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