Retail butter sales in North America posted a 7 percent compound annual growth rate from 2012 to 2017 in value terms at fixed exchange rates, Euromonitor's Moreau said. That compares with 2 percent growth in Western Europe.
"The global sales of U.S. companies benefited strongly from this rise in butter consumption in their domestic market," he said. This was particularly the case for Land O' Lakes Inc., an Arden Hills, Minnesota-based cooperative owned by farmers and ranchers, whose namesake butter brand is the world's most-valuable, according to Euromonitor.
European-style butters are also selling particularly well through higher-end retail stores, said Michael McCully, owner of the McCully Group LLC, a U.S. food and dairy consultancy.
"There is a bigger differentiation in the U.S. market as the domestically produced butter is 80 percent fat, while the global standard is 82 percent fat," McCully said. More fat often means more flavor. "You can also find slow-churned butter with higher fat, cultured butter, and other more specialty butters that, while small in volume, are increasing in share."
Raw milk is processed to make butter and skim milk powder - an ingredient used in everything from infant formula and doughnuts to ice cream and sausages. An oversupply of skim milk powder, or SMP - and corresponding low prices - have made dairy processors reluctant to increase production, effectively limiting butter supplies.
From a 2-million-ton butter stockpile in the mid 1980s, global inventories have dwindled to less than 12 days' supply, an analysis of USDA data show. Coupled with strong demand in many markets, that should keep prices high.
"Looking forward to 2018, butter pricing, while significantly lower, is likely to remain high historically as stocks will take time to replenish with SMP pricing so weak," said Ciaran Aylward, an economist at Dublin-based Ornua Co-operative Ltd., which makes Kerrygold, the world's third most-valuable butter brand.
European butter prices rocketed to 6,500 euros ($8,000) a metric ton last September from 2,350 euros/ton in March 2016, Aylward said in a Jan. 4 statement. While prices fell in the fourth quarter of 2017, so far in 2018 they have gained about 19 percent for exporters in New Zealand, the largest exporter of butter in the international market.
While this is good news for the export market, rising butter prices became a major consumer talking point last year when they hit an all-time high in June.
Consumers became particularly frustrated that imported products sold for the same price as locally sourced butter.
Read more: Butter prices hit a record: 500g at least $5
It also doesn't look as though high prices are going away any time soon.
In the longer term, prices will strengthen in 2018 and dip over the next few years before reaching new highs within a decade, the USDA predicted this month.
Currently, major butter-buyers are likely to delay orders until European milk production picks up in the spring, when higher supplies are expected to soften prices, according to Steve Spencer, director of Fresh Agenda, a Melbourne-based food researcher and advisory firm. Spencer said he was surprised at how resilient more-affluent butter markets in Southeast Asia were amid the soaring prices.
"When prices rose sharply around the world, some markets didn't flinch, still demand held up," he said in an interview. "The world industry has done a good job convincing consumers that this is 'good' fat and better, and there's nothing like testing how loyal they are by hiking prices."
It's not just butter that's benefiting from consumers' renewed taste for animal-fats. Danone, the world's largest yoghurt maker, has started selling a full-fat version of its Activia brand in the Nordic region, "which nobody would've expected to exist a few years ago," Chairman and Chief Executive Officer Emmanuel Faber said last week.
"There is a very segmented approach to what consumers consider as healthy or not," Faber told analysts and investors on a Feb. 16 conference call to discuss fourth-quarter earnings. "Sugar is clearly not what they want to see, but fat, including animal fat, is a trend that's back."