Sweet Rusks. (Hirschsfieg's Inn, Tyrol.)
Take 5 whole eggs in their shells, weigh them; you will want their full weight in white sugar, and the weight of 2 eggs in flour, but keep all separate.
Beat the whites to a stiff froth; have the yolks in another basin, stir only one way, and add the sugar. Mix thoroughly, and then add the stiff white froth, and lastly add the flour; mix well but lightly. Do not beat the flour in or the rusks will be heavy. Flavour with lemon peel or vanilla—the Germans use a little scraped cloves and cinnamon. (If you use a pod of vanilla, pound it with a little sugar.)
Press through a paper funnel 3 tablespoonfuls at a time on to a buttered baking sheet in strips the length of your finger.
Spread the mixture out thin—each should look like a “lady's finger” sponge biscuit crushed out flat. Bake in a quick oven for 5 minutes to make them crisp, by which time they should be a nice light brown. Leave oven door open.
Glaze the tops if you like with egg. They may require 15 or 20 minutes to dry off—all depends on the heat of the oven. Dry them on a sieve in the top of the screen to keep crisp till served. Their crispness is their merit. Serve them with a cream shape.
Lady Clark prefers them unglazed.