So far all rouge recipes I have found have been either a liquid or a salve, but as the picture below of Madame Pompadour suggest, there was rouge in powder from as well. And in a book with a rather wonderful title, The art of cookery made plain and easy: which far exceeds any thing of the kind yet published, to which are added, one hundred and fifty new and useful receipts, and also fifty receipts for different articles of perfumery, with a copious index, by Hannah Glasse, published in 1784, I found one.
TAKE some carmine, and mix it with hair-powder to make it as pale as you please, according to your fancy, (The art of cookery made plain and easy, p. 401)
Breaking down the recipe
Carmine Bright red pigment derived from the cochineal (an insect) scale. Used today to pigment makeup and food.
Hair powder Starch, which in the 18th century were scented and had added white pigment.
Very straightforward recipe and very do-able. I guess that it would work with just plain starch, but as I have made a batch of hair powder I can use that. I need to find some carmine first, though. The result must be pink, which I like as the rouges I have made so far all have been red.
Marquise de Pompadour at the Toilet-Table by François Boucher,1758