Spices & herbs

Spices, onion powder

FDC 171327tsp (2 g)

Source: USDA FoodData Central · Public domain

Original analysis by NutriVerdict

Density 76 · -17 vs Spices & herbs median

Onion powder concentrates a lot of nutrition into a small amount of dried spice: at 341 calories per 100 grams it scores 76 of 100, a Strong result ranking 46 of 60 in Spices & herbs, below the category median of 93. Fiber leads at 54% of the Daily Value, with calcium at 30%, magnesium at 27%, and vitamin C at 26%, all in the excellent tier.

It is used a pinch or teaspoon at a time to season soups, rubs, and sauces rather than eaten in any real quantity, with a typical serving of just 2 grams. The honest caveat is that those Daily Value percentages are calculated per 100 grams, a portion no one actually uses at once, so a teaspoon's real contribution is far smaller. Ground mustard seed scores higher within Spices & herbs for anyone comparing options.

See how this score is calculated, build a plate around spices, onion powder, or compare it with another food.

Source: USDA FoodData Central · Public domain

Fig. 1 · Macronutrient composition
Protein 10.4 g · 11%Carb 79.1 g · 86%Fat 1 g · 3%

Percent of calories derived by NutriVerdict from USDA grams

Nutrition facts

NutrientAmount% DV
Calories341 kcal17%
Total fat1 g1%
Saturated fat0.22 g1%
Cholesterol0 mg0%
Sodium73 mg3%
Carbohydrate79 g29%
Dietary fiber15 g54%
Sugars6.6 g
Protein10 g21%
Potassium985 mg21%
Calcium384 mg30%
Iron3.9 mg22%
Magnesium113 mg27%
Vitamin C23 mg26%
Vitamin A0 µg0%
Vitamin E0.27 mg2%

Source: USDA FoodData Central · Public domain

FDC 171327

Original analysis by NutriVerdict

What it is rich in

Nutrients supplying at least 10% of the Daily Value per 100 grams. 20% or more is an excellent source.

Dietary fiber54% DV
Calcium30% DV
Magnesium27% DV
Vitamin C26% DV
Iron22% DV
Protein21% DV

Original analysis by NutriVerdict

Versus the spices & herbs median

Nutrient density76 vs 93 median
Protein / 100 g10 vs 9.7 median
Fiber / 100 g15 vs 15 median
Sodium / 100 g73 vs 35 median

Original analysis by NutriVerdict

More nutrient-dense swaps

Foods in the same category that score higher on nutrient density.

Spices, mustard seed, groundDensity 78 vs 76Spices, poppy seedDensity 83 vs 76Spices, ginger, groundDensity 85 vs 76

Original analysis by NutriVerdict

In the kitchen and how to use it

Onion powder is made by dehydrating onions and grinding them into a fine powder, giving concentrated onion flavor without the moisture, texture, or prep work of fresh onion. It's a pantry staple for dry rubs on meat, seasoning blends for popcorn or fries, and recipes like dips, marinades, and soups where fresh onion would add unwanted liquid or texture. Because it's so concentrated, a teaspoon goes a long way, and it's often combined with garlic powder, paprika, and salt in homemade spice blends.

Keep onion powder in a sealed container away from light and moisture, where it stays potent for a year or more before its flavor starts to fade. Since it's used in small pinches, typically a teaspoon (2g) at a time, its per-100g nutrient figures are more a reflection of concentration than what a single use contributes; a 100g amount would carry 15.2g of fiber and 341 calories, and notably 54% of the Daily Value for fiber along with 30% for calcium, 27% for magnesium, and 26% for vitamin C. In the tiny quantities actually used per dish, it functions purely as a flavor booster rather than a meaningful source of these nutrients.

Frequently asked questions about spices, onion powder

How is onion powder different from fresh onion?

Onion powder is dehydrated, ground onion, so it delivers concentrated onion flavor without the moisture or texture of fresh onion, making it useful in dry rubs and marinades.

How many calories are in onion powder?

Onion powder has 341 calories per 100g, but since it's used a teaspoon (2g) at a time, an actual serving contributes very few calories.

How should onion powder be stored?

It should be kept in a sealed container away from light and moisture, which keeps its flavor potent for a year or more.

View the USDA source record