Separate egg, chill egg white. Cream butter, 100 g sugar, egg yolk and 1 pinch of salt with the whisk of the mixer. Colour the mixture with food colouring up to the desired red tone. Briefly knead 250 g flour with the dough hooks of the mixer, then knead it into a smooth dough with your hands. Wrap the dough in foil and chill for about 1 hour.
Preheat oven (electric cooker: 180 °C/circulating air: 160 °C/gas: see manufacturer). Line three trays with baking paper. Beat the egg whites and 50 g sugar with the whisks of the mixer until stiff and fill into a piping bag with a small perforated spout.
Roll out dough in portions on a lightly floured work surface to a thickness of approx. 4 mm, cut out gloves. Place on the trays and bake in a hot oven for 6-7 minutes, one after the other. Remove the cookies and decorate with beaten egg white and sugar pearls. Bake for about 2 minutes at the same temperature. Let them cool down.