Switching from white chocolate
If you want a cocoa-forward snack but are unsure how much bitterness you will enjoy, a 70% bar gives you a starting point before trying 85%.
Who is this choice for?
Comparing sweetness on the label
If listed sugar matters to your choice, compare exact bars per 100g. Marks & Spencer lists 29.6g sugars per 100g for its 70% bar and 15.9g for its 85% bar; those figures do not describe every bar at either percentage.
Checking for allergens
If you need to avoid an allergen, read both the ingredients and precautionary wording on the pack you buy. Lindt states that its vegan-recipe Excellence 85% bar is not suitable for people with a milk allergy.
What should you check?
Start with the flavour you would enjoy, then compare nutrition on the same per-100g basis and check the pack against your timing and allergen needs.
| Priority | What to check | Your needs |
|---|---|---|
| Cocoa and sweetness | Read the cocoa-solids percentage and sugars per 100g on each exact bar. Marks & Spencer lists 29.6g sugars per 100g for its 70% bar and 15.9g for its 85% bar; percentage alone does not give every product’s sugar value. | I want more cocoa flavour than white chocolate offers, but I would rather start at 70% than choose an 85% bar I may find too bitter. |
| Timing and portion | Consider when you intend to sleep and how much you plan to eat. NHS Every Mind Matters says caffeine can make you feel more awake and that large meals close to bedtime may make falling asleep harder; it gives no chocolate-specific cut-off here. | If I am going straight to bed after work, I want to think about the timing of my snack rather than choose chocolate for its cocoa percentage alone. |
| Allergens | Check the current pack’s ingredients and any ‘may contain’ statement. Food Standards Agency-commissioned research explains that precautionary wording communicates possible unintended allergen presence. | I need to check both what is in the bar and any cross-contact warning; a vegan recipe alone does not settle whether it suits a milk allergy. |
What can be easy to overlook?
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Assuming all dark chocolate has similar sugar content
Marks & Spencer lists 29.6g sugars per 100g for its 70% bar and 15.9g for its 85% bar. The comparison applies to those products, not every 70% or 85% bar.
Compare sugars per 100g on the bars you are considering, alongside the cocoa percentage and the flavour you expect to enjoy.
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Choosing chocolate to help you settle after a shift
Cocoa percentage does not tell you whether a snack suits your intended bedtime. NHS Every Mind Matters advises that caffeine can make you feel more awake and that large meals close to bedtime may make sleep harder.
If you plan to sleep soon after work, consider having your chocolate earlier in the shift or choosing a different snack.
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Reading ‘vegan recipe’ as an allergy assurance
Lindt says its Excellence 85% bar is made to a vegan recipe but is not suitable for people with a milk allergy. ‘May contain’ wording can also signal possible unintended allergen presence.
For an allergy, use the ingredients and precautionary statements on the exact current pack rather than the words ‘dark’ or ‘vegan’ as your check.
Which brands offer relevant bars?
These brand and retailer examples show why the exact bar matters: cocoa percentage, nutrition and allergen wording vary by product.
Lindt
The Excellence range includes clearly labelled high-cocoa dark bars, including 70%, 85% and 99% examples.
- Lindt lists 15g sugars per 100g for its Excellence 85% bar.
- Lindt states that the same vegan-recipe bar is not suitable for people with a milk allergy; check its pack for the full allergen wording.
M&S
Its labelled 70% and 85% dark bars provide two cocoa percentages to compare.
- Marks & Spencer lists 29.6g sugars per 100g for its 70% bar and 15.9g for its 85% bar.
- Those nutrition figures belong to the named bars; read the current label when choosing a pack.
Waitrose
The No.1 Fairtrade Uganda dark chocolate bar is an 85% cocoa own-label example.
- Waitrose lists 15.5g sugars per 100g and 1.6g per square for this bar.
- Its product information says the bar may contain peanuts, milk and nuts; check the pack before eating.
Galaxy
Galaxy Fusions includes a Dark Chocolate with 70% Cocoa bar.
- Galaxy identifies the plain dark bar as containing 70% cocoa.
- Compare nutrition and allergen information on the exact pack rather than treating the cocoa percentage as a sugar or allergy statement.
Cadbury
Bournville Classic is a 100g dark chocolate bar that Cadbury describes as vegetarian-friendly.
- It offers a named dark-chocolate option to consider if you prefer the Bournville style.
- Check its pack for cocoa percentage and nutrition before comparing it with a labelled 70% or 85% bar.
Dark chocolate options on Joybuy
These dark chocolate bars cover labelled cocoa percentages from 70% to 85% for the night-shift snack decision. Compare the exact pack’s nutrition and allergen information before choosing.
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Morrisons The Best 85% Cocoa Ecuador Dark Chocolate 100g
An 85% cocoa option if you already enjoy a pronounced cocoa flavour. The title identifies a 100g bar; check the current pack’s sugars per 100g and allergen statements before choosing it.
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Green & Black's Dark Chocolate 70% 90g
The product title identifies a 70% dark chocolate bar, a percentage to consider when moving from white chocolate. Check the pack’s cocoa percentage, sugars per 100g and allergen wording before comparing it with an 85% bar.
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Morrisons The Best 72% Cocoa Dominican Republic Dark Chocolate 100g
The labelled 72% cocoa percentage gives you another point to consider between the 70% and 85% bars. Compare sugars per 100g and allergen wording on the current 100g pack; percentage alone cannot establish how bitter it will taste to you.
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Green & Black's Dark Chocolate 85% 90g
Consider this 85% cocoa bar if you prefer a more intense cocoa flavour than a 70% option. Use the current 90g pack to check its per-100g nutrition and any precautionary allergen wording.
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Lindt Excellence 85% Cocoa Dark Chocolate 100g
An 85% cocoa bar for shoppers who prefer a more intense cocoa flavour. Lindt lists 15g sugars per 100g for its Excellence 85% bar and says it is not suitable for people with a milk allergy; read the current pack’s full allergen statement.
Frequently asked questions
Should I replace white chocolate with dark chocolate for a night shift?
Choose dark chocolate if you want a more cocoa-forward flavour and accept some bitterness; the switch is not automatically a better choice for every night shift. Check the bar’s nutrition and allergens, and consider when you intend to sleep.
Should I start with 70% or choose 85% cocoa?
Start around 70% if you are unsure about a more intense cocoa flavour; consider 85% if that flavour appeals and you want to compare listed sugars. Marks & Spencer lists 29.6g sugars per 100g for its 70% bar and 15.9g for its 85% bar, so compare the exact products rather than assuming every bar follows the same pattern.
What if I plan to sleep soon after my shift?
Consider the timing and size of your snack rather than choosing chocolate as a way to wind down. NHS Every Mind Matters says caffeine can make you feel more awake and large meals close to bedtime may make falling asleep harder; that guidance does not set a universal chocolate portion or cut-off time.
Is vegan-recipe dark chocolate suitable for a milk allergy?
Not necessarily. Lindt says its vegan-recipe Excellence 85% bar is not suitable for people with a milk allergy. Check both the ingredients and precautionary allergen wording on the exact pack you intend to eat.