Knead the butter, sugar and salt. Add the egg yolk and lemon zest and knead in. Finally add the flour and knead, then place in the refrigerator for 20 minutes.
Roll finger-thick worms out of the dough. Cut into pieces of the same size. Press in the fingertip with the back of a teaspoon and place an almond on it as a fingernail. Press in the pieces a little so that a finger shape is created. Score the folds of the phalanx with the knife. Bake until golden at 180 ° C.