Mayonnaise may be made in a blender, in which case the whole egg may be used. There is nothing tricky about this if the steps outlined below are closely followed. There is essentially no difference in the texture of the mayonnaise made by hand and that made in the blender. Hand-made mayonnaise, which contains only yolks, may be preferable to blender mayonnaise made with whole egg, but it is a question of taste.
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