This month's revamp will see the Uncle Joe brand character adopt a more youthful appearance on-pack in the first makeover in the family company's 110-year history. The logo will also be enlarged.
Rolling out now, the changes would give the brand "a modern twist and up its appeal outside its core 55-year-old-plus audience", said managing director John Winnard.
"Uncle Joe's is well established in the north west and we are now keen to push south a natural next step," he added.
The company, which is best known for its Mint Balls, has also grouped some of its bestselling sweets under a new Favourites banner to create better recognition for its non-mint products.