Brain Blasterz Advent Calendar

Brain Blasterz Advent Calendar 2026: 25 days of eye-watering sour sweets in a jumbo skull box

The Brain Blasterz Advent Calendar 2026 is a chocolate-free countdown built entirely around sour sweets, and it does not pull its punches. Behind the 25 doors of the big 29 x 31 cm box, marked with a skull in the centre, sit 306g of sweets rated on the brand’s own sourness scale from Level 1 to Level 4, printed on every pack so you know what you are letting yourself in for before you chew.

Be honest with yourself about the audience first. This is one for teens and committed sour-sweet fans, not fragile palates, and it makes a good Secret Santa or an alternative to the usual chocolate calendar. A younger child in our circle did not warm to every flavour: Level 4 is a taste you grow into.

What is inside the Brain Blasterz sour advent calendar 2026?

Across the 25 doors there are 8 types of sweet, drawn from 6 flavours: apple, blueberry, strawberry, cola, lemon and watermelon. The headline is that 4 of the 8 types are full-size, the same packs you would buy in a shop, hidden among the minis: the Sour Brain Breaker 60g with its 5 flavours, a Super Sour Gum Stick, a Sour Powder Double Dip 15g and the Brain Bitz Chew Bar 20g, which turns up twice in the box.

The other four types are minis spread across the remaining doors: Sour Crunch Balls, Chew Balls, mini compressed sweets, and the Chew Bitez, new to the range for 2026. One thing to be clear about: this is not 25 different sweets. Several recipes come round more than once, and the four full-size packs are the treats worth digging for. Every sweet is vegan and halal, which is genuinely rare on the confectionery shelf, and all of them contain soya, so it is not one for a soya allergy.

The maker has not put a content value on the box, and loose sweets cannot be priced up honestly, so I will not invent a figure. The useful measure is weight: 306g for £9.99 works out at roughly £0.40 a door, which puts it at the budget end of the shelf.

=> The full breakdown by type of sweet sits in the SPOILER tab.

This 2026 edition compared with last year

This is a like-for-like return of last year’s best-seller, and I would rather say that plainly than dress up two small tweaks as a reinvention. The format, the 306g weight and the whole spirit are unchanged. Two things actually move: a new festive look on the box, and the addition of the Chew Bitez, the range’s 2026 newcomer. I have no reliable door count for the previous edition to set against this one, so I will stick to what the brand confirms rather than guess at a difference that is not there.

My view on the Brain Blasterz Advent Calendar 2026

What convinces me is the nerve of it. Plenty of sour calendars hedge, mixing in mild sweets so nobody complains. This one commits: the Level 4 packs really do make you pull a face, and the buyers who love it are the ones who wanted exactly that. For a sour-obsessed teen or a Secret Santa wind-up, it lands.

Where it falls down is variety, and it is worth saying out loud. With 8 types and 6 flavours across 25 doors, recipes repeat: you are not unwrapping a surprise invention every morning, you are hunting for the four full-size packs among the minis. The extreme sourness is the other catch, because it genuinely splits a household rather than pleasing everyone.

My summary is blunt: ‘you are paying for the sensation, not the range’. At roughly 40p a door that is a fair deal if the sensation is what you came for, and a poor one if you expected 25 different treats.

Available version:

• Brain Blasterz Jumbo Sour Advent Calendar (25 doors, 306g)

Promo code & delivery, Brain Blasterz:

• Promo code: no code is available at the moment
• Delivery: set by Amazon, free with Prime

You will find all the advent calendars on sale here.

Where to buy the Brain Blasterz Advent Calendar 2026

This calendar is sold at Amazon. There is no promo code right now, and the live price sits at the budget end, around 40p a door. Compare the best offers at the top of the page.