What overrun actually means
Every ice cream maker — from a small-batch dairy to an industrial plant — churns air into the mixture as it freezes. Churning is unavoidable; it stops the whole thing setting into a solid block. The question is how much air ends up in the finished product, and that is precisely what the industry measures with the term overrun.
Overrun is expressed as a percentage. At 100% overrun, half the volume in your tub is air. A cheaper ice cream can sit right at that ceiling, which explains why lifting the lid on some supermarket tubs feels faintly comic: a vast dome that collapses almost immediately, melting to a puddle before you have found the remote control.
Artisan makers run at significantly lower overrun. The mixture stays denser, the scoop holds its shape longer in the bowl, and — the part that matters at the table — the flavour is far more concentrated, because there is simply more of it per mouthful.
Why air is an economic decision
Ice cream is sold by volume, not by weight. That single fact explains most of what you find on a supermarket shelf. Air costs nothing to add, and adding more of it means a tub that looks full while containing less of the expensive ingredients — cream, milk, fruit, chocolate. For a high-volume producer working on thin margins, pushing overrun upward is entirely rational.
For a small maker selling on flavour and reputation, the calculation runs the other way. Keeping overrun low means using more raw ingredients per tub. The price difference between artisan and mass-market ice cream is largely the cost of the air that isn't there.
Reading the ingredients list
Overrun rarely appears on the label, but the ingredients list offers a quick alternative. Ingredients appear in descending order by weight, so in a well-made ice cream, whole milk and cream should sit at the top. When reconstituted whey, glucose syrup or emulsifiers lead the list, you are looking at a product engineered for shelf stability and volume rather than dairy quality.
Reconstituted whey is cheaper and more stable than fresh cream, which is precisely why it appears. It also carries flavour differently — or rather, it carries less of it. Dense, high-fat ice cream made from fresh cream coats the palate in a way that a lighter, airier product cannot replicate, regardless of the flavouring used.
Seasonal flavours as a signal
A maker who is genuinely paying attention tends to let the calendar guide the menu — strawberry in early summer, damson or quince in autumn, something spiced through the winter months. A range that looks identical in February and July, with the same twenty flavours year-round, usually signals concentrates and standardised bases rather than fresh, seasonal ingredients.
This is not a universal rule. Some small makers work with frozen or preserved fruit out of season and do it well. But watching what an artisan producer is making at any given time of year is a reasonable indicator of how seriously they are taking the ingredients.
What to look for when buying
You do not need to quiz anyone at the counter. Lift the tub — if it surprises you with its weight, that is a good sign. Check the ingredients: cream and milk first, a short list overall, nothing that reads like a chemistry syllabus. Notice whether the flavour range shifts across the year. A scoop that takes a while to melt in a warm bowl is further confirmation.
None of this means cheap ice cream is fraudulent. It is made within the rules and serves many purposes well enough. But understanding overrun changes how you read a tub, and it explains why two products that look identical in a freezer can taste so completely different once they are in the bowl.
