Bia's Guide to Selecting and Storing Olive Oil
Olive oil is the first ingredient I reach for when I cook and the last one I want to waste. Over twenty years of restaurant work in New York, then years of home cooking in the North Carolina countryside, I learned the same lesson again and again: the dish rises or falls by the oil. A grassy, peppery pour over ripe tomatoes can transport a person to a tiled kitchen in Sicily. A stale, flat bottle quietly undermines everything else on the plate.
A lot of home cooks I have met treat olive oil as a background player. They buy a generous bottle at the supermarket, leave it by the stove, and reach for it without thinking. The bottle sits there for months, the light works on it, the air gets to it, and by the time it is half empty it tastes like nothing at all. Then they assume they don't like olive oil. The truth is usually that the oil was past its moment, or it was never the right bottle to begin with.
Here in Australia, you happen to live in a country that actually makes excellent olive oil, with groves stretching through parts of Victoria, the Murray River valley, and down into Tasmania. Brands you will see on the shelves at Woolworths and Coles are often pressed within driving distance, not shipped across oceans. That changes the conversation a little. The hunt is less about provenance and more about freshness, harvest date, and how the bottle has been treated between the press and your kitchen bench. A bottle you pick up at Harris Farm or your local weekend market can be weeks old, which means the reward for paying attention is high.
How to taste an olive oil before you commit
Stand in front of a tasting station at a market such as Queen Victoria Market in Melbourne or the Barossa Farmers Market on a Saturday morning, and a small cup of oil in a paper cup tells you almost everything. Lift it to your nose first. A vibrant extra virgin will smell green: freshly cut grass, artichoke leaves, sometimes crushed herb. If the aroma reminds you of crayons, wet cardboard, or musty cloth, walk away. That off bottle won't get better in the pan.
Sip it plain. Real extra virgin olive oil has a signature peppery finish at the back of the throat, a gentle burn that signals the presence of oleocanthal, the same family of compounds that gives fresh-pressed oils their healthful reputation. If the oil feels greasy on the tongue and leaves no finish, it has likely been refined, blended with older oils, or both. The burn is your friend. The slickness is a warning.
When you find a bottle that gives you grass, a soft bitterness, and a clean pepper, buy two. Drink one now and save the other for a side-by-side a few weeks later. A good reference point helps you calibrate your own palate, and it keeps you honest about what is in the pantry. For more on building that kind of small tasting habit into your kitchen reading, the food diary of a sahm is a thoughtful place to wander.
What the label does and does not tell you
The words "extra virgin" get tossed around loosely, and the Australian Extra Virgin Olive Oil standard is genuinely strict. For a bottle to wear that label in your Woolies aisle, it has to be cold-extracted by mechanical means and chemically tested for free fatty acidity, peroxide value, and several other markers that most of us could not pronounce. If the bottle says "extra virgin" and the price is dramatically lower than its neighbours, look closer at the country of origin. Bulk oil from one region blended and bottled in another is allowed, and the label will say so. Nothing dishonest, but not the same as a single-estate bottle from a friend down in Geelong.
The harvest date, sometimes called the crush date, matters more than the best-before date. Olives picked in April in the Southern Hemisphere should reach Australian shelves within months, not a year and a half later. A bottle without any harvest information at all is usually older than the grower wants to admit, even if the best-before still looks generous. Look for the certification marks from the Australian Olive Association, which most Australian producers will display voluntarily because shoppers have learned to look for them.
Pay attention to the bottle colour too. Clear glass is lovely on a shelf and unhelpful to the oil inside. A dark green or amber bottle, or a tin, has a reason. Light is one of the four enemies of olive oil (along with heat, oxygen, and time), and a clear bottle fights against you from the day it leaves the store. If a favourite local brand only comes in clear, keep it in the cupboard, not on the bench.
Buying olive oil the Australian way
Australian shoppers have an unusually good relationship with their olive oil producers, because many of the country's biggest names are also among the most traceable. Cobram Estate, for instance, owns groves in the Murray Valley and bottles within weeks of harvest. Their extra virgin shows up in the regular supermarket run, including at Aldi during the food award season when they often release limited pressings. Buying from a known Australian producer is rarely a bad bet, and the price-to-quality ratio is hard to argue with.
Farmers' markets are where the real fun lives. The Parramatta Farmers' Market in Sydney's west, the Adelaide Showground market, the Hunter Valley olive groves, or your local weekend community market will often have a small grower pouring their current vintage. The bottles cost a little more per 100 millilitres, but they are frequently fresher than anything pre-packed on a supermarket shelf. Ask the grower when the olives were picked, where the trees grow, and how soon after pressing the bottle was filled. A grower who loves their oil will talk for ten minutes. A grower to avoid brushes you off.
A small kit that has changed how I shop for oil is a compact tasting pourer I tuck into my market tote. It lets me pour a few controlled drops into my own cup so I can compare two or three growers side by side, without burning through the paper cups that stall holders hand out. Online is the third lane, and it suits anyone outside a major centre who still wants a single-origin bottle. Australian Olive, The Olive Grove Tasmania, and Boundary Bend all run direct shipping, and most will let you choose a delivery date during the cooler months so the bottle does not spend a day in the back of a hot delivery van. Some Melbourne sellers even ship in foam-lined boxes with ice packs, which sounds theatrical until you remember how a Melbourne summer afternoon can hit fifty degrees in the shade.
Storing olive oil so it actually tastes like something
Once the bottle is home, the work shifts. Heat is public enemy number one for olive oil in the Australian context, where kitchens in Brisbane or Perth can climb into the mid-thirties on a summer evening and a benchtop beside a west-facing window turns into an oven. The ideal spot is a cool cupboard away from the stove, ideally below twenty degrees and away from the toaster, the kettle, and any other heat-making appliance on the bench.
Oxygen is the second enemy, which is why large tins and bag-in-box formats exist. The smaller the surface area of oil exposed to air, the slower it will oxidise. A bottle you finish within four to six weeks of opening is a happier bottle than one you slowly top up for six months. If you tend to cook with olive oil in big glugs for soups, bread, and roasted vegetables, it pays to decant half into a smaller bottle and leave the rest sealed. The refillable dark glass bottles most greengrocers sell are an old kitchen trick that works surprisingly well. Switch out the batch every few weeks and you will notice the difference in a simple drizzle over a torn piece of sourdough, which is exactly the kind of thing I write about in my notes on soups and breads.
Light, finally, stays a constant threat. Even a cupboard with a glass door is too bright. If you have a cellar, a utility room, or a cool laundry shelf, use it. Short of that, the back of the pantry behind the tinned tomatoes beats anywhere near the window. Some home cooks wrap their bottles in a tea towel for the same reason. Nothing fancy required.
Where extra virgin belongs, and where it does not
Extra virgin olive oil is a finishing ingredient, in my kitchen at least, and I treat it accordingly. Drizzle it over a green salad dressed simply with lemon and salt. Pour it over a bowl of steamed globe artichoke, or onto a bruschetta with ripe tomatoes and torn basil. Use it to dress a tray of roasted root vegetables in the last five minutes of cooking so the green, grassy notes survive the heat. These are the moments the oil is built for, the moments where a beautiful bottle really sings. A look through my favourite appetizers will show plenty of places where the finishing drizzle does the heavy lifting.
Save the daily cooking oil for a less precious bottle. A robust Australian extra virgin handles gentle sautéing, a quick pan of garlic and prawns, or a slow sweat of onions very well, especially if you keep the heat at medium and add the oil to the pan once aromatics are already singing. For deep frying or anything above one hundred and eighty degrees, switch to a neutral grapeseed, sunflower, or rice bran oil. Olive oil can take the heat, technically, but you will taste the bitter, burnt edge if the bottle you reach for was a gifted single-estate number you were saving for something special. Save the good bottle for the plate.
After two decades in professional kitchens, I have come to believe that a little less oil, of better quality, dropped onto each plate is the better trade. With a fresh bottle, a cool dark cupboard, and a habit of buying what you will finish within a few weeks, olive oil stops being a quiet afterthought on your shelf and starts being one of the most generous ingredients in the room.