The present invention relates to a method for preparing dehydrated avocados, a method for preparing an avocado oil rich in unsaponifiable matter, a method for preparing an avocado cake rich in sugars and proteins, and a method preparing an unsaponifiable fraction; these processes all comprising a step of drying avocado strips by microwave until dehydrated avocados having a residual humidity less than or equal to 5%, during this step the water evaporated under the action of micro -waves being eliminated by a flow of hot air of temperature less than or equal to 80 ° C and / or by air extraction.
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