Oat Cult overnight oats cost £1.60 a breakfast on subscription with 1 billion live cultures

Oat Cult, the young British brand selling prebiotic overnight oats in letterbox boxes, now charges £18 for a box of nine sachets, which drops to £1.60 a breakfast when you subscribe to the 27 pack. Each sachet promises 1 billion live cultures, a third of your daily fibre and no added sugar, according to the brand. We looked at the prices, the flavours and the catches to see whether it beats a bag of supermarket oats.

Oat Cult: why everyone is suddenly talking about overnight oats in a sachet

Oat Cult started selling on Amazon in March 2025 and has since built its own subscription shop. The pitch is simple: tear open a sachet, add milk, leave it in the fridge overnight and breakfast is waiting in the morning. The brand says it now has more than 12,000 “cult members” and shows a 4.7 star rating on its site, and it has leaned hard into gut health at a time when kefir, kombucha and fibre are all over TikTok.

On 27 October 2026, the homepage offers subscribe and save up to 20%, free delivery from two packs and a free Tiramisu sachet with your second box.

What is inside an Oat Cult box?

Every sachet is a single 60g serving of gluten free oats with seeds and Bacillus subtilis DE111 cultures. The current range:

• Overnight Gut Oats Cinnamon: the original, with cinnamon and seeds.
• Overnight Gut Oats Cacao: cocoa and cacao nibs for chocolate fans.
• Overnight Gut Oats Strawberry Goji: fruitier, with dried strawberry and goji berries.
• Overnight Gut Oats Tiramisu: the newest flavour, also given away free with your second subscription box.
• Mixed Box: three flavours in one box if you cannot choose.

Source: Oat Cult

How much does Oat Cult cost per breakfast?

This is where the subscription matters. On 27 October 2026, oatcult.com lists these prices for each flavour:

• 9 sachets: £18 one off (£2 a breakfast) or £16.20 on subscription (£1.80).
• 18 sachets: £36 one off or £30.60 on subscription (£1.70 a breakfast).
• 27 sachets: £54 one off or £43.20 on subscription (£1.60 a breakfast).

Source: Oat Cult

Delivery is free from two packs; a single box is charged at checkout depending on where you live. The Cult Card, a £20 gift card, is there if you want to try it on someone else first.

What we think: a clever habit, an expensive bowl of oats

Our take is mixed, and we think that is fair. The good: the format really does solve the “no time for breakfast” problem, the flavours avoid added sugar, and the subscription makes the maths far less painful than the £2 one off price suggests. A box arriving through the letterbox is also the kind of small routine that keeps people eating well on weekday mornings.

The less good: you are still paying around £1.60 for oats, seeds and a probiotic culture you could assemble yourself for well under £1. The live cultures claim is the brand’s own, and Bacillus subtilis is a spore forming strain that survives dry storage, which is why it can sit in a sachet. Treat the gut health benefit as a nice extra, not a reason to buy, and check with your GP if you have a medical condition. We have not tested the oats ourselves.

It will suit you if you skip breakfast because of time, like flavoured oats and want portion control. If instead you already make your own overnight oats on a Sunday, the sachets add little apart from convenience.

Price and subscription: the essentials

• Price: £18 for 9 sachets one off; £16.20, £30.60 or £43.20 on subscription for 9, 18 or 27 sachets.
• Best value: 27 sachets on subscription, £1.60 a breakfast.
• Delivery: free from two packs; UK standard delivery takes three to five working days once dispatched.
• Extras: free Tiramisu sachet with your second box; subscriptions can be managed from your account.
• Prices checked: 27 October 2026 on oatcult.com.

You can build your box on the Oat Cult website, and for more breakfast and snack ideas, browse our pick of food subscription boxes.