Households, restaurants and bakeries be warned, butter prices are expected to rise well above last year's records, already sitting just 5% below the highs set last September.
ASB senior rural economist Nathan Penny said butter prices were already well up on the same period a year ago, and the seasonal lull in New Zealand milk production was still to come.
"We anticipate butter prices will shatter last year's records over coming months," Mr Penny said.
In October last year, butter prices were up more than 60% against a year earlier. By November, one Dunedin supermarket's cheapest 500g block cost $5.90 and there were reports of $8 blocks in other Otago towns.
A year ago, a metric tonne of butter was selling for less than $US5000 ($NZ6800) in global markets. At present it is selling for well over $US5500 ($NZ7500).