Vacuum-sealing nuts, coffee and dry foods: is it worth it?

Vacuum sealing is usually associated with meat, fish or sous-vide. Yet it is particularly worthwhile for dry foods such as nuts, coffee, rice or pulses – because they spoil mainly through oxygen, moisture and pests. Here is what vacuum does and when it really pays off.

Why do dry foods spoil at all?

Even without a high water content, dry foods lose quality over time – for several reasons:

• Oxidation: oxygen turns high-fat foods rancid – especially nuts, seeds and wholegrain products.
• Moisture: it causes clumping, mould and a loss of crispness.
• Loss of aroma: volatile aromas – for example in coffee and spices – escape into the surrounding air.
• Pests: pantry moths and other storage pests attack openly stored goods.

What vacuum sealing does

Vacuum sealing removes the air – and with it most of the oxygen – from the bag. This brings several benefits at once:

• Less oxidation: without oxygen, fats turn rancid much more slowly.
• Aroma is preserved: the bag keeps volatile aromas inside.
• Protection from moisture and pests: the sealed bag acts as a barrier.
• Longer shelf life: depending on the product, storage time can be extended many times over.

Important: vacuum sealing is not sterilisation. It slows spoilage but does not replace cool, dry and dark storage – and for moist foods it does not replace refrigeration or freezing.

Nuts and seeds

Nuts and seeds have a high fat content and quickly turn rancid in the air. Vacuum-sealed and stored cool and dark, they stay fresh considerably longer. For very long storage they can also be frozen while vacuum-sealed.

Coffee

Coffee loses its aroma mainly through oxygen – ground coffee even faster than whole beans. Vacuum sealing keeps the aroma fresh; store the bag cool and dark, but not in the fridge (moisture and foreign odours).

A note on freshly roasted coffee: it still releases carbon dioxide. Let the beans rest for one to two days before vacuum sealing, or use bags with an aroma valve so the bag does not puff up again.

Rice, pasta, pulses, flour & co.

For these staples, protection from moisture and storage pests is the main point. Vacuum-sealed, even large packs can be stored compactly and safely – ideal if you buy in bulk.

When is vacuum sealing worth it?

It is especially useful if at least one of these applies:

• You buy in larger quantities or store for a long time.
• The product is high in fat (nuts, seeds, wholegrain) and turns rancid easily.
• Aroma is decisive (coffee, spices).
• You want to protect supplies from pantry moths.

For foods you use up quickly anyway, vacuum sealing brings little additional benefit.

Store correctly: vacuum is only half the job

You get the best result by combining vacuum with good storage conditions: cool, dry and dark. For very long shelf life, additional freezing is possible. Also make sure to use the right bag type for your machine – more on that in our guide Which vacuum bags are the right ones?

Looking for the right bags or rolls for your supplies? Browse our vacuum bags and rolls – we are happy to help.