Break the egg, mix with kefir and heat this mixture to a temperature of 37 degrees. Pour into a bucket from a bread machine, add melted butter and vegetable oil to kefir.
Sprinkle flour on top, place salt and sugar in different corners of the bucket. Pour the yeast into the well in the center of the flour.
Bake bread on kefir in a bread machine, selecting the "Basic" mode, medium crust, loaf weight 900 g.