Step 1

Whisk together the egg yolks, chicken stock, chicken fat, parsley, and salt. Stir in the matzo meal. In the bowl of an electric mixer with a whisk attachment, whip the egg whites with a pinch of salt until they are stiff. Whisk them into the matzo mixture until it is smooth. Refrigerate for at least 15 minutes, or until the mixture is thick.

Step 2

Form balls the size of golf balls by shaping them with 2 spoons, rolling them with your hands, or scooping them with a small ice cream scoop. Drop them into simmering chicken stock and cook for 30 minutes, or until fully cooked and puffed, turning once. Remove and serve hot in chicken soup.