Unilever-owned ice cream brand Ben & Jerry’s has unveiled its latest limited-edition flavour, Marshmallow Sky, marking the newest addition to the brand’s indulgent ice cream line-up.

The new variety features a blue marshmallow-flavoured ice cream base swirled with marshmallow ribbons and mixed with chocolate chip cookie dough chunks.

The flavour’s signature sky-blue hue is derived from blue spirulina, a natural ingredient containing phycocyanin, a pigment known for its vibrant colour and antioxidant properties. Ben & Jerry’s said that the use of spirulina was intended not only for its visual appeal but also for its potential nutritional benefits.

Phycocyanin is recognised for its antioxidant and anti-inflammatory activity, while spirulina is a source of protein, B vitamins, iron and copper. Though some studies suggest spirulina may support heart health and have anticarcinogenic potential, Ben & Jerry’s emphasised that its inclusion primarily enhances the product’s natural colouring and better-for-you positioning.

Marshmallow Sky will be available for a limited time in pint format at US retailers, while Ben & Jerry’s Scoop Shops will feature the flavour as a permanent menu item.

The launch reflects Ben & Jerry’s continued focus on novelty flavours and natural ingredients, as the brand balances indulgence with consumer demand for clean-label and functional food elements.