Fluffy Coke and Dirty Soda: The Viral Drink Trend Explained (and How to Make It)

Every so often a drink trend arrives that is so simple it seems strange nobody thought of it sooner. Dirty soda was the first — a fizzy soft drink transformed with a splash of cream and a pump of flavoured syrup, served over crushed ice. Then came Fluffy Coke, which took the idea somewhere stranger and, arguably, better: a cup lined with Marshmallow Fluff, filled with ice, and topped with cola. Both blew up on TikTok. Both are now arriving in the UK. And both are built almost entirely from American soda and store-cupboard ingredients — which is exactly why they are worth understanding.

This guide explains what dirty soda and Fluffy Coke actually are, where the trend came from, how to make them, and — for retailers — why a customisable drink trend is quietly driving demand for American sodas and Marshmallow Fluff in the UK.

What Is Dirty Soda?

Dirty soda is a soft drink with additions. At its simplest, it is a carbonated soda mixed with a flavoured syrup and a splash of cream or coffee creamer, poured over plenty of ice. The 'dirty' refers to the cream clouding the clear fizz of the soda — the drink goes from transparent to swirled and opaque. The original and most famous version is Diet Coke with coconut syrup, fresh lime juice and a splash of cream, a combination that tastes, according to almost everyone who tries it, like an icy cola at a tropical beach.

The appeal is customisation. There is no single dirty soda — there are as many versions as there are combinations of soda, syrup and cream. A dark cola with vanilla syrup and cream tastes like a fizzy cream soda float. Dr Pepper with a coconut and lime edge becomes something tropical. Root beer needs almost nothing added to sit in dirty-soda territory already. The drink is a template, not a recipe, and that is the whole point — every customer builds their own.

Where the Trend Came From

Dirty soda is not new, and it is not from TikTok originally. It comes from Utah, where a large Latter-day Saint population — who as a matter of faith do not drink alcohol, coffee or tea — built an entire soft-drink culture in their place. Dedicated 'soda shops' emerged across the state, offering menus of customised sodas the way a coffee shop offers customised lattes: pick your base, pick your syrups, add cream, served over the region's beloved pebble ice. Chains like Swig, which opened in 2010, turned the customised soda into a genuine local institution decades before the rest of the world noticed.

What TikTok did was take that regional tradition and make it global. Videos of soda-shop orders and homemade versions spread the concept far beyond Utah, and the customisable, photogenic, non-alcoholic nature of the drink made it ideal short-video content. By 2026 the trend had gone fully mainstream — Yelp searches for the term climbed sharply year on year, food publications from Forbes to Allrecipes were covering it, and PepsiCo had launched a pre-packaged Dirty Mountain Dew Cream Soda, the clearest possible sign that a social media trend had become a permanent product category.

What Is Fluffy Coke?

Fluffy Coke is the trend's stranger, sweeter successor — and it is genuinely simpler. Where dirty soda needs syrups and cream, Fluffy Coke needs just two things: Marshmallow Fluff and a soda. You take a jar of Marshmallow Fluff, smear a thick layer around the inside of a cup, fill the cup with ice, and pour cola over the top. As the cola hits the Fluff, it pulls wisps of marshmallow into the drink, creating a soft, sweet, marshmallowy cola with a cloud of Fluff clinging to the sides of the glass.

The trend originated when a TikTok creator made one with her grandmother — affectionately nicknamed 'Memama' — and the internet, as it does, voted the result a ten out of ten. Hundreds of creators followed with their own versions using Coke, Diet Coke and Dr Pepper. The appeal is obvious once you see it: it looks ridiculous and delightful in equal measure, it takes thirty seconds to make, and it uses an ingredient — Marshmallow Fluff — that most British customers have heard of via the Fluffernutter sandwich but never quite found a reason to buy. Fluffy Coke is that reason.

How to Make Fluffy Coke

The recipe is almost too simple to write down, but here it is. Take a jar of Marshmallow Fluff and spread a generous layer around the inside walls of a tall glass — the more Fluff, the fluffier the result. Fill the glass with ice. Slowly pour your cola of choice over the ice and watch the Fluff swirl into the drink. Stir once if you want it fully marshmallowy, or leave it to drink through the Fluff clinging to the glass. That is the entire method.

The soda you choose changes everything. Classic cola — a Cherry Coke gives it a fuller, sweeter base than standard cola. Dr Pepper, with its 23-flavour complexity, makes a richer, spiced version that stands up especially well to the marshmallow. And for a genuinely different result, Marshmallow Strawberry Fluff instead of the original turns a Cherry Coke Fluffy into something closer to a strawberries-and-cream soda float. Sweet and Glory stocks Marshmallow Fluff in original 213g, Strawberry 212g, and a larger 454g format — the larger tub is the one for anyone planning to make these more than once.

How to Make Dirty Soda With What You Stock

The classic dirty soda uses flavoured coffee syrups, but you can build an excellent version using American sodas that already carry bold, dessert-led flavours — which removes the need for specialist syrups entirely. The C&C Soda range is particularly well suited: the Vanilla Cream, Cotton Candy, Cream Soda and Black Cherry flavours are practically dirty sodas in the bottle already, and a splash of cream turns them into the full thing. Root Beer — whether A&W or the C&C Root Beer — needs only a splash of cream to become the classic American root beer float in drinkable, sippable form.

For a syrup-led version, the Hershey's syrup range — Chocolate, Strawberry, Caramel — works as the flavour base. A pump of Hershey's Chocolate Syrup and a splash of cream turns a cola into a fizzy chocolate egg cream, the classic New York soda-fountain drink. Hershey's Strawberry Syrup with a cream soda base makes a strawberries-and-cream fizz. The Calypso range of glass-bottle lemonades — with their real fruit pieces and bold tropical flavours — also make a natural fruity dirty soda base for anyone who wants to skip the cola entirely.

For Retailers: Why This Trend Matters

A customisable drink trend is an unusually good thing for a sweet shop or convenience retailer, because it drives demand across several products at once rather than a single line. A customer building Fluffy Cokes needs the Fluff and the cola. A customer making dirty sodas needs the soda, the syrup and often a second flavour to experiment with. The trend turns single-item purchases into multi-item baskets, and it does so around products — American sodas, Marshmallow Fluff — that most UK supermarkets do not stock in the relevant flavours or formats.

Stock the hero ingredients together. Marshmallow Fluff next to the American cola fixture creates an instant Fluffy Coke display. A small shelf card explaining the trend does the rest — most customers who have seen it on TikTok already know what to do.

Lead with the sodas that carry the trend. Cherry Coke, Dr Pepper, A&W Root Beer, and the dessert-flavoured C&C Soda lines are the bases the trend is built on. These are also strong sellers in their own right, so stocking them for the trend carries no downside if the trend cools.

It is content that makes itself. A jar of Fluff, a bottle of cola, and a phone is a complete piece of social media content. Retailers who make a demonstration Fluffy Coke and film it are riding a trend their customers are already watching, using stock they already hold. For more on how social trends drive UK candy and drink demand, see our TikTok candy trends guide.

Shop American Sodas and Fluff Wholesale in the UK

Sweet and Glory stocks the full range needed to build the trend — Marshmallow Fluff, Dr Pepper, A&W Root Beer, the C&C Soda dessert range, Calypso, Cherry Coke, and the Hershey's syrup range. Browse the full American drinks range and the grocery range for everything the trend needs. Create a free account to browse and order.

No minimum order. Free first parcel on orders over £150 ex VAT (additional boxes £7.10 each). Free pallet delivery over £650 ex VAT. Dispatched from Manchester.

Related guides: Best American sodas UK · American drinks wholesale guide · C&C Soda: back in the UK · Dr Pepper and the 23 flavours mystery · Calypso lemonade UK guide · TikTok candy trends guide