Mustard Plaster
Ingredients
Directions
Mix the mustard powder with cold water until it reaches a putty-like consistency.
Spread the mixture ⅛ inch thick on brown paper.
Warm the plaster before the fire.
Apply it to the affected area.
If the skin is sensitive, lightly brush the plaster with salad oil.
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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