Recipe: Essence of Lemon-Peel

Rub lumps of loaf-sugar on fine ripe lemons till the yellow rind is all grated off; scraping up the sugar in a tea-spoon, and putting it on a plate as you proceed. When you have enough, press it down into a little glass or china jar, and cover it closely. This will be found very fine to flavour PUDDINGs and cakes.
Prepare essence of orange-peel in the same manner.

Directions for Cookery, In Its Various Branches.
Ladies and Professional Cooks.
The Whole Science and Art of Preparing Human Food. (Year 1840)