Disclosed is a process for preparing alkyl polyglycosides having a color of less than or equal to 1.5 VCS, the process successively involving: a) a glycosylation step a) consisting in a reaction between at least one alcohol of formula (I) and at least one reducing sugar of formula (III): H—O-(G)-H (III), in the presence of at least one acid catalyst (CA) at a minimum temperature of 100° C. and a maximum temperature of 120° C., b) a step b) of neutralizing the reaction medium from step a) with an aqueous solution comprising a basic agent (Ab), c) a step c) of removing the sugar of formula (III), which has not reacted in step a), from the neutralized reaction medium, and d) a step d) of recovering at least one composition (C) having a color of less than or equal to 1.5 VCS.