Fluffy Coke and Dirty Soda Explained

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 have now caught on 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 name started with the Dirty Dr Pepper - Dr Pepper with coconut syrup and a splash of cream - though the most famous version now 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 more than a decade 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 ready-to-drink Dirty Mountain Dew, 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 something close to a fizzy chocolate egg cream, the classic New York soda-fountain drink (which uses soda water rather than cola). 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.

The Named Variants, and What Goes in Each

Dirty soda is a method rather than a single drink, and almost nobody searches for the method. They search for the specific version they have seen, and the names have settled into a handful of standards.

Dirty Dr Pepper is the one that has travelled furthest. Coconut syrup and lime, with cream added in most versions. Dr Pepper already carries a heavy, slightly medicinal spice profile, and coconut softens it rather than fighting it — which is why this combination works better than the same treatment applied to a plain cola. See the Dr Pepper guide for why that flavour profile behaves as it does.

Dirty Diet Coke is one of the most common Utah versions. Coconut syrup, a squeeze of lime, and cream. The diet base matters more than it sounds — full-sugar cola plus syrup plus cream is a great deal of sweetness at once, and the diet version leaves room for the additions to be tasted.

Dirty Mountain Dew is the fastest-growing of them. Citrus rather than cola, so the usual coconut is often replaced with a fruit syrup — peach, raspberry or strawberry — and the cream turns it into something closer to a float than a soda.

Dirty Pepsi and the other cola versions behave like the Diet Coke original, and the choice generally comes down to whichever cola somebody drinks already.

The common structure across all of them is soda, a flavoured syrup, an acid and a dairy element. Change any one and you have another named variant, which is precisely why the trend has kept producing new ones.
 

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.

Frequently Asked Questions

What is Fluffy Coke? Marshmallow Fluff spread inside a glass, with cola poured slowly over it. The carbonation lifts the Fluff into a foam that sits on top and dissolves gradually as you drink, so the first mouthful is almost entirely marshmallow and the last is almost entirely cola. Two ingredients, no equipment.

What is dirty soda? A carbonated soda with syrup and cream added - usually a flavoured syrup and a splash of coconut or single cream over ice. It is a build rather than a recipe: there is no single dirty soda, only combinations.

Where did dirty soda come from? Utah, not TikTok. A large Latter-day Saint population there does not drink coffee or alcohol, and a soda-shop culture grew up in their place - drive-through counters building customised sodas to order. TikTok took a regional tradition and made it global.

How do you make Fluffy Coke at home? Spread a generous layer of Marshmallow Fluff around the inside of a tall glass, then pour cola slowly down the side. Pour too fast and it collapses; pour slowly and it foams. Cherry Coke gives a sweeter base than standard cola.

What is a dirty Dr Pepper? Dr Pepper with coconut syrup and lime, usually with cream stirred through. It is the most popular of the named variants and the one most likely to be ordered by name. Dr Pepper's heavy spiced profile suits coconut in a way a plain cola does not, which is why this version travelled beyond Utah faster than the original.

What is a dirty Mountain Dew? The citrus version. Because the base is not a cola, the coconut syrup usually gives way to a fruit syrup — peach, raspberry or strawberry are the common ones — with cream added. The result is closer to a float than to the cola-based versions, and it is currently the fastest-growing variant by search.

Why is it made with Diet Coke? Because the additions need room. A dirty soda is already carrying flavoured syrup and a dairy element, and building that on full-sugar cola produces something most people find too sweet to finish. The diet base keeps the syrup and cream tasteable rather than lost, which is why the Utah versions use it.

Where can I buy the ingredients wholesale? Sweet and Glory stocks Marshmallow Fluff alongside the American soda range - cola, Dr Pepper, root beer and the C&C dessert-flavoured lines - wholesale from Manchester with no minimum order. Create a free account to browse and order.

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

Sources

Swig - founding and the Utah dirty soda category
US beverage trade press - dirty soda variants and syrup combinations
Manufacturer ingredient declarations - checked per product, not per brand

Written by Sharon Wilson, Sweet and Glory. Sweet and Glory has imported American and world confectionery into the UK from Trafford Park, Manchester, since 2015.