Hosts watching calories per portion
For individually served party snacks, compare the kcal in the bar each guest would receive. A small bar and a larger bar are different portions, even when both are sold as snacks.
Who are these bars for?
Hosts catering for different dietary needs
Individually packaged bars let guests inspect the exact ingredients. Vegan, gluten-free and no-added-sugar labels answer different questions; none replaces an allergen check for the people attending.
Guests wanting a more substantial snack
If protein or fibre matters more than the lowest kcal figure, compare those values alongside the whole bar’s energy. The named Nature Valley and TREK protein bars have larger portions and higher declared kcal per bar than the Alpen Light bar.
What should you check?
Start with the portion you plan to put out, then check dietary suitability for each flavour rather than choosing from a front-of-pack description alone.
| Priority | What to check | Your needs |
|---|---|---|
| Calories per bar | Compare kcal for one bar and its weight. Weetabix Cereals lists 65 kcal per 19 g Alpen Light Chocolate & Fudge bar; Waitrose & Partners lists 116 kcal per 30 g Graze Cocoa Vanilla Oat Boost, and Tesco lists 133 kcal per 35 g Nakd Berry Delight bar. Per-100-g figures help compare products of different sizes on the same weight basis. | I want to know the calories in the portion I will actually hand to a guest. |
| Allergens | Read the ingredients and any may-contain statement on the exact pack. Weetabix Cereals lists gluten-containing cereals, milk and soya for Alpen Light Chocolate & Fudge and says it is unsuitable for people with nut allergies. Tesco lists cashew in Nakd Berry Delight and warns that it may contain peanuts and other nuts. | If guests have allergies, I need to check each flavour and keep its wrapper available rather than treating the assortment as suitable for everyone. |
| Protein and fibre | Check the amount per bar together with its kcal and weight. Nature Valley UK lists 10.2 g protein, 4.4 g fibre and 196 kcal for its 40 g Protein Peanut & Chocolate bar; TREK lists 9 g protein and 227 kcal for its 50 g Cocoa Oat bar. | A more substantial snack may suit some guests, even if it is not the lowest-calorie portion on the table. |
| Sugar claims | Read the total-sugars line as well as any no-added-sugar claim. Tesco lists Nakd Berry Delight as no added sugar while declaring 17 g sugars and 133 kcal per 35 g bar. Nature Valley UK explains that “of which sugars” includes sugars from all sources. | I want to compare the stated sugars and calories, not assume that a no-added-sugar bar has low totals for either. |
Common selection mistakes
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Assuming a smaller bar suits every guest
Weetabix Cereals lists Alpen Light Chocolate & Fudge at 65 kcal per 19 g bar, but it contains gluten-containing cereals, milk and soya; the manufacturer also says it is unsuitable for people with nut allergies.
Compare calories per bar for portion planning, then check the pack separately against guests’ dietary requirements.
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Reading a dietary claim as a calorie or allergen check
Tesco lists Nakd Berry Delight as no added sugar and gluten-free, yet its 35 g bar declares 133 kcal and 17 g sugars and contains cashew. A claim about one attribute does not answer the others.
Check the energy, sugars, ingredients and allergen statements for the exact flavour you intend to serve.
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Choosing protein bars for the lowest-calorie portion
Nature Valley UK lists 196 kcal for its 40 g Protein Peanut & Chocolate bar, while TREK lists 227 kcal for its 50 g Cocoa Oat bar. Both exceed the 65 kcal declared by Weetabix Cereals for a 19 g Alpen Light Chocolate & Fudge bar; the portions are different sizes.
Choose by the portion and nutrition attributes that matter for your guests, rather than treating “protein” as a low-calorie label.
Brand and product references
These figures and dietary details refer to the named products and flavours, not every bar made by each brand.
Alpen
For a small individually portioned bar, Weetabix Cereals lists Alpen Light Chocolate & Fudge at 65 kcal per 19 g bar.
- The lowest declared kcal per bar among the five named products compared here.
- Contains gluten-containing cereals, milk and soya; Weetabix Cereals says it is unsuitable for people with nut allergies.
Graze
Waitrose & Partners lists Cocoa Vanilla Oat Boosts at 116 kcal per 30 g portion and describes them as suitable for vegans.
- The listing describes this oat-based product as high in fibre.
- The listing includes possible allergens such as eggs, milk, peanuts, nuts, mustard and sesame; check the exact pack.
Nakd
Tesco lists Berry Delight as a fruit-and-nut bar with 133 kcal per 35 g portion and gluten-free, vegan and no-added-sugar claims.
- An individually portioned fruit-and-nut option for guests seeking those stated dietary attributes.
- Contains cashew, may contain peanuts and other nuts, and declares 17 g total sugars per bar.
TREK
TREK lists its Cocoa Oat bar as a vegan 50 g portion with 9 g plant protein and 227 kcal.
- A larger protein-containing option when the lowest kcal per bar is not the main criterion.
- Declares 14 g sugars per bar and may contain peanuts, nuts and milk.
Nature Valley
Nature Valley UK lists its 40 g Protein Peanut & Chocolate bar at 196 kcal, with 10.2 g protein and 4.4 g fibre.
- A protein-and-fibre option for guests who prefer those stated attributes to the lowest kcal per portion.
- Contains peanut, soya and milk and may contain tree nuts.
Joybuy snack-bar options
These snack-bar packs offer different flavours and portion formats to consider for individually served Christmas-party snacks. Check each pack’s nutrition and allergen information before choosing for guests; the figures for other flavours above do not apply to these products.
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Special K Dark Chocolate Snack, 6 × 21.5 g
A six-bar pack for offering individual portions. Check the kcal and allergen information on the exact pack before serving.
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Nakd Blueberry Muffin Raw Fruit & Nut Bars, 4 × 35 g
A fruit-and-nut bar option in four 35 g portions. Check this Blueberry Muffin flavour’s own nutrition and nut-allergen statement; Berry Delight figures do not describe it.
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Nature Valley Crunchy Family Variety Pack, 10 × 42 g
A variety pack of crunchy bars. Check whether the nutrition panel gives values per 42 g pack or per individual bar before comparing the portion you will serve.
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Kellogg's Strawberry Nutri Grain Bars, six-pack, 222 g
A strawberry bar option if you want another flavour in the party selection. Use the pack’s per-bar nutrition and allergen statement when deciding who can be offered one.
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Graze Oat Boosts Cherry Bakewell, 4 × 30 g
Four 30 g Cherry Bakewell oat bars for individual portions. Check this flavour’s own kcal and allergen information rather than using figures for Graze Cocoa Vanilla Oat Boosts.
Frequently asked questions
Which of the compared bars has the fewest calories per bar?
Alpen Light Chocolate & Fudge has the lowest declared kcal per individual bar among the five named products compared here: Weetabix Cereals lists 65 kcal per 19 g bar. For the portion you plan to serve, compare per-bar values first; use per-100-g values when you want to compare products on an equal-weight basis.
Does no added sugar mean a snack bar has few calories or little sugar?
No. Tesco lists Nakd Berry Delight as no added sugar but declares 133 kcal and 17 g total sugars per 35 g bar. Nature Valley UK explains that the “of which sugars” figure includes sugars from all sources, so read both that line and the energy value.
Can I put different bars together for guests with allergies?
Do not assume a mixed assortment suits every guest. Weetabix Cereals says Alpen Light Chocolate & Fudge is unsuitable for people with nut allergies; Tesco lists cashew and possible peanut and other nut presence for Nakd Berry Delight; Nature Valley UK lists peanut, soya and milk in its Protein Peanut & Chocolate bar. Keep the exact wrappers available so guests can check ingredients and allergen statements before taking a bar.
Is a protein bar the lower-calorie party option?
Not among these named examples. Nature Valley UK lists 10.2 g protein and 196 kcal for its 40 g Protein Peanut & Chocolate bar, while TREK lists 9 g protein and 227 kcal for its 50 g Cocoa Oat bar. Those larger portions may suit guests seeking a more substantial snack, but compare kcal per bar if a lighter individual portion is the aim.