How we scored it
The product contains soybean oil, which is a heavily processed ingredient, and added sugar, both of which negatively impact its healthiness. Despite the presence of some beneficial ingredients like egg yolks and vinegar, the overall processing level and use of harmful ingredients result in a lower score.
Nutrition facts
| Per 1 packet (9 g) | Amount | % DV |
|---|---|---|
| Calories | 70 | |
| Total fat | 7g | 9% |
| Saturated fat | 1g | 5% |
| Trans fat | 0g | |
| Cholesterol | 5mg | 2% |
| Sodium | 45mg | 2% |
| Total carbohydrate | 0g | 0% |
| Dietary fiber | 0g | 0% |
| Sugars | 0g | |
| Protein | 0g | 0% |
White Castle's published nutrition. Percentages are of the daily value on a 2,000-calorie diet.
Key ingredients
8Soybean OilVery Bad
Soybean oil is highly processed and often genetically modified, which can be a concern for those seeking minimally processed foods.
See more about Soybean Oil →SugarBad
Sugar is a processed sweetener that can contribute to excess calorie intake and is often linked to health concerns when consumed in large amounts.
See more about Sugar →Egg YolksGood
Egg yolks provide natural fats and nutrients, contributing to the richness and flavor of the mayonnaise.
See more about Egg Yolks →Distilled VinegarGood
Distilled vinegar adds acidity and flavor, and is a natural preservative in the mayonnaise.
See more about Distilled Vinegar →Lemon Juice ConcentrateGood
Lemon juice concentrate provides natural acidity and flavor, and contains vitamin C.
See more about Lemon Juice Concentrate →SaltNeutral
Salt enhances flavor and is a common seasoning, used here in moderation for taste.
See more about Salt →WaterNeutral
Water is a neutral ingredient essential for the mayonnaise's texture and consistency.
See more about Water →Mustard FlourNeutral
Mustard flour is a natural spice that adds flavor without significant health concerns.
Scout's score is an independent read of White Castle's published ingredient statement and nutrition for this item, last scored October 2026. Recipes change — check the chain for today's menu. Scout takes no payment from any chain. How we score · Full White Castle menu.