3.6 %
Vitamin B12 contributes to normal energy-yielding metabolism, to the normal function of the immune system and to the reduction of tiredness and fatigue.
How many calories are in onion sauce?
13.2kcal
in a 15 g tablespoon
88 kcal per 100 g.
Source: UK CoFID 2021, record 17-815. Checked 5 October 2026.
0.71 gFat
0.45 gProtein
0.15 gFibre
3.6 %Daily vitamin B12
What’s in a 15 g tablespoon
More than half of a tablespoon is water. The rest is 1.4 g carbohydrate and 0.71 g fat.
- 0.71 gFat
- 0.45 gProtein
- 1.4 gCarbohydrate
- 0.15 gFibre
- 12.4 gWater
Below average for sauces, soups and condiments
Onion sauce is 88 kcal per 100 g. The 92 sauces, soups and condiments in this database average 154.
Onion sauce88
Sauces, soups and condiments average154
Low in sugar and salt
Low sugars and low salt by UK labelling rules, per 100 g.
Sugars, per tablespoon0.72 g
Salt, per tablespoon0.02 g
Vitamins and minerals in onion sauce
Nothing reaches the “high in” level, but two of the 20 count as a source, led by vitamin B12.
Show all 20 with amounts
Vitamin B120.00009 mg, 3.6 %
Chloride20.1 mg, 2.5 %
Iodine0.00315 mg, 2.1 %
Calcium14.4 mg, 1.8 %
Phosphorus11.7 mg, 1.7 %
Riboflavin (vitamin B2)0.02 mg, 1.6 %
Potassium23.1 mg, 1.2 %
Pantothenic acid (vitamin B5)0.06 mg, 1 %
Niacin (vitamin B3)0.14 mg, 0.8 %
Vitamin B60.01 mg, 0.8 %
Biotin0.00036 mg, 0.7 %
Zinc0.06 mg, 0.6 %
Thiamin (vitamin B1)0.01 mg, 0.5 %
Folate0.00105 mg, 0.5 %
Manganese0.01 mg, 0.5 %
Copper0 mg, <1 %
Magnesium1.7 mg, <1 %
Vitamin C0.3 mg, <1 %
Selenium0.00015 mg, <1 %
Iron0.03 mg, <1 %
Badges use the UK legal thresholds per 100 g: 15 % of the reference intake for “source of”, 30 % for “high in”.
What onion sauce doesn’t give you. And where to find it.
Only 1.8 % of the selenium reference intake, 2.5 % of the vitamin C reference intake and 4 % of the zinc reference intake per 100 g.
Selenium
1.8%in onion sauce, per 100 g
Find it inKidney, pig, fried491 % per 100 g
Vitamin C
2.5%in onion sauce, per 100 g
Find it inCherries, West Indian2150 % per 100 g
Zinc
4%in onion sauce, per 100 g
Find it inOysters, raw592 % per 100 g
100 mgVitamin C, 125 %
0.075 mgSelenium, 136 %
0.00125 mgVitamin D, 25 %
Or one scoop of Immufix
Every 25 g scoop declares 100 mg of vitamin C, 0.00125 mg of vitamin D and 0.075 mg of selenium, alongside other vitamins and minerals. Vitamin C, vitamin D and selenium contribute to the normal function of the immune system.
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Tracked UK delivery
Free standard delivery to UK addresses. Royal Mail 48 tracked, usually 2 to 3 working days.
Made in Cambridgeshire
Made in the UK since 1998, with every nutrient and its declared amount listed on the label.
Onion sauce against other sauces, soups and condiments
Onion sauce comes second for vitamin B12 here, just behind cheese sauce (packet mix, made up with semi-skimmed milk).
0.001mg
0.0006mg
0.0006mg
0.0004mg
0.0003mg
Onion sauce, made with semi-skimmed milk, homemadethis page
Scotch broth−0.0002 mg
Mayonnaise−0.0003 mg
All values per 100 g, from the same dataset. Differences are against onion sauce.
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Questions about onion sauce
Four questions chosen by the facts above, so every food answers differently.
How many calories are in a portion of onion sauce?
A typical portion (15 g, one tablespoon) gives 13 kcal. Per 100 g the figure is 88 kcal.
Is onion sauce a source of vitamin B12?
It is a source of vitamin B12: 0.0006 mg per 100 g, 24 % of the NRV, which passes the 15 % threshold for “source of” but not the 30 % needed for “high in”.
Are these figures exact for onion sauce?
No. They are calculated from a standard recipe in the UK Composition of Foods Integrated Dataset (CoFID, 2021). A different recipe, portion of sauce or cooking method will move them, so read them as a typical estimate.
Which vitamins and minerals does onion sauce have most of?
By share of the daily reference intake: vitamin B12 (0.0006 mg, 24 %), chloride (134 mg, 17 %) and iodine (0.021 mg, 14 %) per 100 g.
How these numbers were made
Every figure comes from the UK Composition of Foods Integrated Dataset (CoFID), 2021 edition, record 17-815, Onion sauce, made with semi-skimmed milk, homemade, published by Public Health England under the Open Government Licence v3.0; this record is a calculated recipe estimate. Main data references: Updated 2014. Values are per 100 g of the edible part; a tablespoon is 15 g, one tablespoon, the usual UK portion for sauces, soups and condiments. Reference intakes follow Regulation (EU) 1169/2011 Annex XIII as retained in GB law; “source of”, “high in” and “low” follow Regulation (EC) 1924/2006, assessed per 100 g. Function lines are the authorised wording from the GB register of nutrition and health claims, credited to the nutrient. Energy is rounded to the whole kcal and kJ; other amounts to one decimal, or two below 1. A trace is shown as “trace” and never gets a figure or a badge; a nutrient never analysed is left off the page. We start from the dataset’s 2,887 records and keep 2,322: records weighed with bone, shell or skin, alcoholic drinks, infant foods, brand-named products, records with fewer than eight measured vitamins and minerals and near-identical variants are left out. Group context uses the 92 sauces, soups and condiments kept from the dataset; a rank counts only the foods with a measured figure for that nutrient. Merged variant: made with skimmed milk: 80 kcal, 3.8 g fat, 1.25 g saturates; made with whole milk: 91 kcal, 5.5 g fat, 2.68 g saturates. Food images are illustrations from Ingredient Atlas, released under CC0; they show the food, not the measured sample, and where no illustration of the exact food exists the nearest one is shown (here: Onion). Checked 5 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.
More sauces, soups and condiments
From the same group, with calories per 100 g, and the foods with the most vitamin B12.
More sauces, soups and condiments
Most vitamin B12
- Hollandaise sauce0.0025 mg
- Cheese sauce0.0011 mg
- Cheese sauce, packet mix, made up with semi-skimmed milk0.001 mg
- Liver, ox, raw0.11 mg
- Liver, ox, stewed0.11 mg
- Liver, lamb, fried0.083 mg
- Vitamin B12 guide