If a declared cocoa-solids figure is your deciding factor, Tesco lists a minimum of 48% in its dark chocolate, while Sainsbury’s lists 35% in its dark chocolate. Neither figure describes the whole biscuit or establishes which will taste darker. For a picnic, weigh that distinction against pack size, storage directions and the allergens of everyone sharing.
If the word “dark” is not enough to make your choice, Tesco and Sainsbury’s each state a minimum cocoa-solids percentage for the chocolate on their digestives. Compare that figure separately from the amount of chocolate in the biscuit.
Pack size, outdoor storage and guests’ allergies all affect what to bring. Check the exact packet before serving, particularly when an ingredient or precautionary allergen statement matters to someone sharing it.
Start with the chocolate’s cocoa declaration if that matters to you, then choose a pack you can share and store as directed.
| Priority | What to check | Your needs |
|---|---|---|
| Cocoa declaration | Look for the minimum cocoa solids in the chocolate, not just the chocolate’s share of the biscuit. Tesco lists 48% minimum cocoa solids in chocolate that makes up 30% of its biscuit; Sainsbury’s lists 35% minimum in chocolate that makes up 27% of its biscuit. | I want a stated cocoa figure for the coating, rather than choosing by the word “dark” alone. These declarations do not tell me which whole biscuit will taste darker. |
| Pack and storage | Check the weight of the exact pack and its storage instructions. Tesco calls for an airtight container after opening; M&S specifies a cool, dry place away from sunlight. | I need enough biscuits to share without leaving an opened chocolate-coated packet in the sun or damp. |
| Allergens | Read the delivered pack’s ingredients and precautionary allergen statements before serving. Tesco’s listing says “may contain milk”; Sainsbury’s warns that its digestives are unsuitable for customers with an oat allergy because of manufacturing methods. | Someone sharing may have an allergy, so I need to check the particular packet rather than assume “dark” means dairy-free. |
“30% dark chocolate” describes how much of the biscuit is chocolate, not how much cocoa the biscuit contains. Tesco and Sainsbury’s give separate minimum cocoa-solids figures for their chocolate.
Read the chocolate percentage in the ingredients and the cocoa-solids declaration as two different measures.
The McVitie’s, Sainsbury’s and ASDA products described in the research list milk ingredients; Tesco’s listing says its product may contain milk.
Check the actual packet’s ingredients and allergen warnings against each guest’s needs before serving.
M&S and ASDA specify storage away from sunlight. ASDA also instructs shoppers to use an airtight container after opening.
Protect the packet from sun and moisture, and follow its after-opening directions.
These brand references concern the particular dark-chocolate digestive products described, not every biscuit each brand makes.
Tesco lists a 300g own-label pack with a declared cocoa minimum for its dark-chocolate coating.
Sainsbury’s lists a 300g own-label alternative with a declared cocoa minimum.
McVitie’s lists dark-chocolate digestives in several pack sizes, including 266g and 400g.
ASDA lists a 300g own-label dark-chocolate digestive pack.
M&S lists a 300g dark-chocolate digestive made with demerara sugar.
These McVitie’s packs offer two sizes to consider when planning how many dark-chocolate digestives to bring to a picnic. Check the particular pack if a cocoa-solids declaration or an allergen affects your choice.
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The 2 x 266g twin-pack format gives you two packets to plan around when sharing at a picnic. Check the packaging’s ingredients and allergen information before serving.
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The 400g pack is another size to consider when planning how many biscuits to share. Check its cocoa declaration, allergens and storage directions on the packet where those details matter to your picnic.
No. It describes the proportion of the biscuit that is dark chocolate. A cocoa-solids declaration describes the chocolate itself; Tesco’s listing gives these as separate figures.
Follow the purchased pack’s storage directions rather than assuming these biscuits require refrigeration. M&S and ASDA specify keeping their listed products away from sunlight. Food Standards Scotland’s advice to use a cool bag with ice packs applies to picnic foods you would ordinarily refrigerate at home; it does not itself impose that requirement on these biscuits.
Check the directions on your packet and keep the biscuits protected from sun and moisture. The reviewed listings call for airtight storage after opening; ASDA additionally says to consume its listed product within seven days of opening, which is not an instruction for every brand.
Check the delivered packet before serving, especially if a guest has an allergy. Ingredient and precautionary allergen information on a retailer page should not replace the information on the pack you receive.