Who is each format for?

Shoppers buying one treat

If you want one item rather than a pack to keep for later, compare the 35g chocolate-covered bars listed by Tesco with the individual 20g Barratt Flump listed by Sainsbury’s.

Shoppers checking ingredients

Check the exact flavour and current label when milk, soya, gluten-containing cereals or animal gelatine affect your choice. These ingredients and warnings differ between the listed products.

Shoppers who need a precise delivery

If another flavour, format or ingredient profile would not work, set your substitution preferences before checkout and check any substitute offered.

What should you check before ordering?

Decide whether you need to buy just one sweet before comparing flavours, labels and delivery settings.

Priority What to check Your needs
Pack format Tesco lists Mallow & Marsh chocolate-covered bars at 35g each; Sainsbury’s lists an individual 20g Barratt Flump. Check the pack count on cereal bars: ASDA lists eight-bar packs. I want to buy one treat, not a multipack of individually portioned snacks.
Ingredients Check the chosen flavour’s ingredients and allergen statement. Tesco’s two listed Mallow & Marsh bars contain beef gelatine; its raspberry dark-chocolate bar contains soya and may contain milk. ASDA’s listed Kellogg’s Rice Krispies Squares contain barley, wheat and milk. Dark chocolate alone does not answer my milk question, and I need to check gelatine or gluten-containing cereals against my requirements.
Per-bar figures Compare like-sized portions and read the unit on the label. Tesco lists 149 kcal for its 35g vanilla Mallow & Marsh bar and 150 kcal for its 35g raspberry bar. I’m comparing the amount in the bar I would eat, rather than assuming that a light texture means a particular nutrition value.
Substitutions State essential requirements in a Tesco shopper note, although Tesco says preferences cannot always be accommodated. Waitrose lets customers deselect its ‘Allow substitution’ option. A different bar or flavour might not meet my format or ingredient requirements, so I want to set my preferences before the order is picked.

Common ordering mistakes

  • Treating all marshmallow snacks as the same format

    A chocolate-covered 35g mallow bar, an individual 20g Flump and a multipack of cereal bars are different purchases, even when their names mention marshmallow.

    Check whether the listing is for one chocolate-covered bar, one plain mallow sweet or several cereal bars.

  • Assuming dark chocolate means no milk

    Tesco’s listed raspberry dark-chocolate Mallow & Marsh bar may contain milk and contains beef gelatine; its vanilla milk-chocolate bar contains milk, soya and beef gelatine.

    Read the current ingredient and allergen statement for the exact flavour, and check any proposed substitute separately.

  • Leaving important substitution preferences unstated

    A substitute could change the flavour, pack format or ingredient profile. Tesco accepts shopper notes but says it may not be possible to meet every preference; Waitrose offers an option to turn substitutions off.

    Specify what cannot change in a shopper note, or disable substitutions where that option is available.

  • Relying only on an earlier online listing

    The item delivered is the one you will eat, so its packaging matters when ingredients or allergen information affect your choice.

    Use the listing to choose a product, then check the current wrapper when it arrives.

Relevant brand references

Mallow & Marsh

Tesco lists 35g chocolate-covered marshmallow bars in vanilla with milk chocolate and raspberry with 70% dark chocolate.

  • Each listed flavour is a single 35g bar.
  • Both listed bars contain beef gelatine. The vanilla bar contains milk and soya; the raspberry bar contains soya and may contain milk.

Barratt

Sainsbury’s lists an individual 20g Flump for shoppers who want a mallow sweet rather than a chocolate-covered bar.

  • The listed item is an individual 20g sweet.
  • It is not a chocolate-covered bar; check the exact item’s ingredient and allergen panel if those details affect your choice.

Kellogg’s Rice Krispies Squares

ASDA lists the marshmallow-flavoured cereal bars as a pack of eight 28g portions.

  • The pack contains individually portioned cereal bars.
  • It is not a one-bar purchase or a plain marshmallow sweet. The listed product contains barley, wheat and milk.

Joybuy product option

This option is for shoppers who are happy to buy a marshmallow-flavoured cereal-bar multipack rather than one marshmallow sweet.

Kellogg's Rice Krispies Squares Marshmallow Snack Bars, 8 x 28g

Kellogg’s Rice Krispies Squares Marshmallow Snack Bars, 8 x 28g

Consider these if you want separate cereal-bar portions and accept buying a pack of eight rather than one mallow bar. Each bar is 28g; the listed product contains barley, wheat and milk and may contain other gluten-containing cereals and soya. Check the current pack label if ingredients affect your choice.

Joybuy

Questions about marshmallow treats

Is a dark-chocolate marshmallow bar dairy-free?

Do not assume so from the chocolate type. Tesco’s listing for the Mallow & Marsh raspberry bar says it may contain milk; it also lists soya and beef gelatine. Check the current label for the exact bar.

Are the listed Mallow & Marsh bars vegetarian or vegan?

No. Tesco’s ingredient lists for both the 35g vanilla and raspberry bars include beef gelatine, so neither listed bar meets a vegetarian or vegan requirement.

What allergen information should be available when ordering food online?

GOV.UK allergen guidance dated 17 July 2026 says that, for distance selling in England, Northern Ireland and Wales, businesses must provide allergen information at two stages of the order process. Check the information for the exact product while ordering and its packaging on delivery.

How can I avoid an unsuitable grocery substitution?

Set your preferences before checkout: Tesco accepts a shopper note, though it says requests cannot always be accommodated, and Waitrose lets you deselect ‘Allow substitution’. If a substitute is offered, check its own current ingredient and allergen information rather than assuming it matches your original choice.

Is a marshmallow-flavoured cereal bar the same as a marshmallow bar?

No. ASDA lists Rice Snaps as a toasted rice cereal bar with marshmallow-flavoured crème in an eight-pack of 22g bars, and Kellogg’s Rice Krispies Squares as an eight-pack of 28g cereal bars. Choose that format only if a cereal bar and a multipack suit the purchase you have in mind.