The campaign will target the key audiences of families and pre-families in more than 2.5m households.
The message will be backed up by the brand’s “Time Traveller” advertising and through-the-line marketing.
This is Cravendale’s third annual door drop, the previous pushes having reached 10m households.
The 2009 drive saw an additional 200 000 new customers trial the product and a 14% increase in sales.
Sam Dolan, Cravendale’s brand manager, says: “We have seen a significant uplift in sales following our past door drops and a great retention in loyal customers.”