The family-owned company, which launched a crisps brand under a joint venture with Taypack five years ago, will further diversify by introducing four varieties of Mackie's chocolate before the end of the year.
The range will initially focus on two milk and two dark chocolate products.
Each will come in 100g packs, expected to retail at £1.89 and compete with brands at the premium end of the market, such as Lindt and Green & Blacks.
Mackie's, which plans to produce its first run of the chocolate in the coming weeks, has been developing the product over the past two years.
Managing director Mac Mackie, one of the fourth generation of the Mackie family to run the business, said: "We have been making ice cream since 1986 and it has become quite an established brand.
"We started making crisps in partnership with the Taylor family in Perthshire about five years ago and that has gone very well. It has shown that the brand is extendable into other areas.
"From there we thought, what else can we add that fits with our whole philosophy and gets maybe a bit more out the brand?"
Development director Kirstin Mcnutt, sister of Mac and also of marketing director Karin Hayhow, has been heavily involved in the project's development.
Ms Mcnutt worked closely on the project with Macintyre Chocolate Systems of Arbroath, the equipment manufacturer.
Mr Mackie said: "We have been speaking to all of our existing customers and the response is very good. I am confident we will get good listings by the end of the year.
"We will very much aim for the Scottish market straight away, but also I think chocolate has great potential as an export product.
"The crisps especially have been doing a lot of exporting and we expect that the same customers could do an awful lot with the chocolate."
Mackie's crisps are exported to around 30 countries, including Canada, Dubai and Singapore.