When the sun shines, but the westerly wind bites, it can mean only one thing in Brisbane.

Strawberry sundaes are back.

Not just any strawberry sundae, the Ekka strawberry sundae, a union of dairy and berry so magical no one can resist its allure.

More than 10 tonnes of south-east Queensland's best Ruby Gem strawberries are mixed with ice-cream and cream from the state's best milkers to create a treat that crosses the political divide, unites town and country, turns frowns upside down and, it's said, makes unicorns cry from happiness.

But there is a serious side to the sought after treat, estimated to end up in the bellies of 145,000 people by the end of the 10-day show, thanks to the hard scooping efforts of 2500 volunteers.