Runners planning long-run fuel
If you are considering a small sweet bar during a run, its carbohydrate per whole bar matters more than the word ‘fudge’ on the front. Check how it fits alongside the other food and drink you plan to carry.
Who might consider a fudge bar?
Runners looking for an after-run sweet
A portioned fudge bar may appeal as a treat after an easier session. That is a different choice from relying on it for a long run or treating it as a complete post-run meal.
Buyers checking allergens
Fudge-style bars have different ingredient and precautionary statements. Check the current pack for the allergens relevant to you, rather than assuming products with similar names have the same profile.
What should you check before choosing?
The UK Sports Institute advises matching carbohydrate intake to the demands of each training session. Decide what role the bar will play, then compare the whole-bar nutrition and ingredients rather than choosing by flavour alone.
| Priority | What to check | Your needs |
|---|---|---|
| Carbohydrate portion | Read carbohydrate per whole bar, not just per 100 g. Waitrose lists 16.5 g for a 22 g Cadbury Fudge bar; Marks & Spencer’s 36 g Vanilla Fudge Bar works out at about 23.8 g. | For a longer, demanding run, I need to know what one bar contributes to my planned intake. A 2015 sports-nutrition review advises 30–60 g carbohydrate per hour for 1–2.5 hours of high-intensity exercise; neither example reaches the lower end on its own. |
| Eating it on a run | Check fat and any polyols on the label, then practise the portion and timing. Waitrose lists 3.4 g fat per 22 g Cadbury bar; Marks & Spencer’s figures work out at about 8.0 g per 36 g bar. | Will I be comfortable eating this exact bar while running? I would rather find that out in training than introduce it during an important session. |
| Ingredients and allergens | Read the current ingredients and precautionary statements. Marks & Spencer lists milk and soya for its Vanilla Fudge Bar and says it is unsuitable for people with nut, peanut or egg allergy. | I need a pack whose allergen information meets my requirements. GOV.UK says any of the 14 specified allergens present in UK prepacked food must be clearly identified in its ingredients list. |
| Purpose of the bar | Compare carbohydrate with protein and check any consumption warning. Waitrose lists Grenade Fudged Up as a fudge-flavour protein bar and carries an excessive-consumption laxative-effect warning. | If I want a sweet snack after training, I may choose differently than when planning carbohydrate to eat during a long run. A fudge flavour does not tell me how much carbohydrate the bar contains. |
| Pack format | Check the weight of each portion and whether the bars are individually wrapped if you intend to carry one. A multipack weight alone does not answer the wrapping question. | I want to know whether the portion I plan to take is practical to carry and easy to account for in my run plan. |
Common fuelling mistakes
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Counting one fudge bar as the whole long-run plan
Waitrose lists 16.5 g carbohydrate for a 22 g Cadbury Fudge bar, and Marks & Spencer’s figures give about 23.8 g for its 36 g bar. Each is below the 30–60 g per hour advised in a 2015 sports-nutrition review for 1–2.5 hours of high-intensity exercise.
Work from the carbohydrate in the complete bar and the demands of your session. If you carry fudge, count it as one part of a practised plan rather than assuming it covers the run.
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Choosing by ‘fudge’ flavour or low sugar alone
A fudge-flavoured protein bar has a different nutrition profile from an ordinary fudge bar. Waitrose lists 32 g carbohydrate per 100 g for Grenade Fudged Up and an excessive-consumption laxative-effect warning.
For food you intend to eat while running, compare carbohydrate per whole bar and read the ingredients and warnings. Try the exact product in training first.
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Trying a richer bar for the first time on a key run
The fat content differs between products: Waitrose lists 3.4 g per 22 g Cadbury Fudge bar, while Marks & Spencer’s figures give about 8.0 g per 36 g Vanilla Fudge Bar. What feels comfortable to eat while running is individual.
Practise the portion, timing and drink you will use with it during training. If that combination does not suit you, choose another food for the run.
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Assuming fudge bars have the same allergens
Marks & Spencer lists milk and soya in its Vanilla Fudge Bar and says it is unsuitable for people with nut, peanut or egg allergy. Cadbury Fudge also contains milk-derived ingredients.
Read the label on the pack you receive, including relevant precautionary statements, before eating it. Do not rely on the name of a previous or different bar.
Relevant product lines
These examples show why portion size, ingredients and intended use need checking product by product; they are not interchangeable single-run fuels.
Cadbury
Waitrose lists Cadbury Fudge as a milk-chocolate-covered fudge in a 4 × 22 g multipack.
- Waitrose lists 16.5 g carbohydrate and 3.4 g fat per 22 g bar.
- It contains milk-derived ingredients; one bar is below the hourly carbohydrate range cited for 1–2.5 hours of high-intensity exercise.
M&S
The 36 g Vanilla Fudge Bar combines a vanilla fudge centre with chocolate.
- Marks & Spencer lists 66.1 g carbohydrate per 100 g, equivalent to about 23.8 g per bar.
- The label lists milk and soya and says the bar is unsuitable for people with nut, peanut or egg allergy.
NOMO
Sainsbury’s describes the NOMO Choc Fudge XL Bar as a 120 g plant-powered, sharing-style chocolate and fudge bar.
- The 120 g pack size is stated on the retailer listing.
- Check the current pack’s portion, carbohydrate and allergen information before considering it for a training run.
Grenade
Fudged Up is a 60 g fudge-flavour protein bar, rather than an ordinary fudge bar.
- Its listed nutrition works out at about 19.2 g carbohydrate per 60 g bar.
- Waitrose lists polyols and warns that excessive consumption may cause a laxative effect; check whether this is the type of snack you want during exercise.
Fudge options on Joybuy
This four-bar Cadbury Fudge pack is an option to consider if you want a small sweet portion or a measured addition to a longer-run food plan. Check the pack format before relying on it for carrying individual bars.
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Cadbury Fudge Bar 4 Pack 88g
Consider a portion as a sweet snack or as one measured part of a practised run plan, not as the sole fuel for a long run. Joybuy lists 75 g carbohydrate per 100 g for this 88 g four-pack and identifies milk as an allergen. Check the current wrapper for ingredients and allergen information, and confirm individual wrapping if you intend to carry a bar.
Questions about fudge and training
Is one fudge bar enough fuel for a marathon training run?
Do not rely on one as your only fuel for a long, demanding run. Waitrose lists 16.5 g carbohydrate for a 22 g Cadbury Fudge bar, and Marks & Spencer’s figures give about 23.8 g for its 36 g Vanilla Fudge Bar. A 2015 sports-nutrition review advises 30–60 g per hour for 1–2.5 hours of high-intensity exercise, so plan your intake around the session rather than the bar alone.
Should I eat fudge before, during or after training?
The useful timing depends on the session and whether you are comfortable eating that bar. An occasional sweet snack before or after an easier session is a different choice from fuelling a long run; for on-run use, test the portion and timing in training and count its carbohydrate within your broader plan. The UK Sports Institute advises adjusting carbohydrate intake to training demands.
Is a fudge-flavoured protein bar a substitute for ordinary fudge during a run?
Not on flavour alone: compare carbohydrate per whole bar for the job you want it to do. Waitrose’s figures for the 60 g Grenade Fudged Up bar work out at about 19.2 g carbohydrate, and its listing carries an excessive-consumption laxative-effect warning. That makes the full label and a training trial particularly relevant before considering it as on-run food.
How do I check allergens on a fudge bar?
Read the current pack’s ingredients and relevant precautionary statements. GOV.UK says any of the 14 specified allergens present in UK prepacked food must be clearly identified in the ingredients list. For example, Marks & Spencer lists milk and soya in its Vanilla Fudge Bar and says it is unsuitable for people with nut, peanut or egg allergy.
Can I choose a bar using an online nutrition listing alone?
Use the listing to compare candidates, then check the nutrition, ingredients and allergen information on the pack you receive. If you plan to carry a bar during a run, confirm its portion size and whether the individual bars are wrapped before depending on that format.