Cheap Basil, Big Pesto: Make and Freeze It Now

Homemade pesto is cheaper and fresher than almost every jar on the shelf, and August is the month to make it. Swiss basil is at its seasonal low, so a big blender batch works out at roughly CHF 0.70–1.30 per small jar. Freeze it in portions and you have summer sauce until spring.

Swap the pricey pine nuts for sunflower seeds and use cheap in-season basil, and one afternoon of blitzing replaces a winter of CHF 3–5 jars. A household that freezes ten small jars instead of buying them saves roughly CHF 25–40 from a single batch.

Why August is the month to make pesto

Basil is a high-summer crop, and August is when Swiss and neighbouring greenhouse supply peaks. That is when the living pots at Coop and Migros are fullest, the market bunches are biggest, and any basil on your own balcony is threatening to bolt. Cheap, abundant basil is the whole reason to batch now rather than in November, when a sad little pot costs the same CHF 3 for a third of the leaves.

Timing matters more in Switzerland than almost anywhere else. Swiss food prices sit about 61% above the EU average, so the gap between a home-made sauce and a bought one is wider here than across the border. Basil is also one of the few ingredients you can grow for next to nothing: a single balcony plant gives leaves all summer. Our guide to what a Swiss windowsill really saves runs the numbers on herbs, and basil for pesto is where a pot pays for itself fastest.

Is homemade pesto actually cheaper than jarred?

Mostly yes, but it depends which jar you hold it against. The very cheapest own-brand jar is hard to beat on raw price alone. The catch is what is inside it: thin on basil, heavy on oil, and cheaper oils at that. Against the standard branded jar most people actually buy, and against the fresh chilled pesto in the fridge aisle, a home batch wins clearly on both price and quality.

What is a cheap substitute for pine nuts?

Pine nuts are what make pesto expensive. At CHF 5–7 per 100 g they can cost more than the basil, cheese and oil combined. The good news is that the nut is the easiest ingredient to swap, and cooks in Liguria were never precious about it.

• Sunflower seeds: the cheapest option by a distance, around CHF 0.50–1 per 100 g. They blitz into a smooth, mild pesto and are the swap behind the under-CHF-1 jar.
• Walnuts (Baumnüsse): about CHF 2 per 100 g, earthy and rich, a classic in Swiss and northern-Italian kitchens.
• Cashews: creamy and mild, roughly CHF 2–3 per 100 g, good for a rounder sauce.
• Almonds or pumpkin seeds: both work and both undercut pine nuts; toast them first for a deeper flavour.

Toasting whichever seed or nut you choose for a few minutes in a dry pan lifts the flavour enough that most people never miss the pine nuts. If you want the traditional taste at half the nut cost, go half pine nuts, half sunflower seeds.

How do you make a big batch that freezes well?

The method is the same whether you make one jar or ten; you simply scale the quantities. A food processor, or a tall jug and a hand blender, does the work in minutes.

1. Prep the basil. Wash and dry it well. For the greenest colour that survives freezing, blanch the leaves for five seconds in boiling water, plunge them into iced water, then squeeze dry. This step is optional but keeps the batch bright.
2. Blitz everything. Basil, your seeds or nuts, a garlic clove, hard cheese, a good pinch of salt and olive oil. Pour the oil in a stream until it just comes together, and stop before it warms and dulls.
3. Portion it. Spoon into small jars or an ice-cube tray. Each cube slot holds roughly one serving, which makes future dinners easy to dose.
4. Cap with oil. Top each jar or cube with a thin film of olive oil to seal out air and hold the colour.
5. Freeze, then bag and label. Once solid, tip the cubes into a freezer bag and write the date on it. Stored flat, they take almost no space.

How long does homemade pesto keep?

In the fridge, under a layer of oil, fresh pesto holds about a week. In the freezer it keeps three to six months, and is best used within three for colour and taste. A batch left cheese-free and light on garlic keeps at the longer end.

Freezing the August glut is also one of the simplest ways to waste less food. Swiss households throw away roughly 119 kg of food per person every year, and soft herbs are among the first things to wilt and get binned. Turning a bolting basil plant or a reduced bunch into frozen pesto is exactly the kind of move covered in our guide to freezing, canning and pickling the summer glut.

How much does a summer of pesto make you save?

The average Swiss household spends around CHF 636 a month on food and non-alcoholic drinks, and jars of sauce are a quiet part of that line. Get through two jars of pesto a fortnight over the cooler months and that is easily CHF 80–120 a year on pesto alone at branded-jar prices.

Make a big August batch for CHF 10–15 in ingredients, freeze ten to twelve jars, and you cover most of that for a fraction of the cost, saving in the region of CHF 30–50 across the season on pesto by itself. The frozen jars then double as a fast-dinner shortcut: stir one through hot pasta and dinner is ready in the time the water boils, which is the spirit of our no-shop pantry recipes.

The one thing worth watching is when the ingredients themselves go on Aktion. Basil, olive oil and hard cheese all cycle through promotions, and buying them cheap is what pushes a jar under CHF 1. Eini's algorithm tracks current prices across Coop, Migros, Lidl, Aldi, Denner and Aligro, so a cheap-basil week shows up in your plan and grocery list as a cue to make a batch, without you reading a single flyer.