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How Many Calories in Cereals Ready-to-eat, Frosted Oat Cereal with Marshmallows?

✓ Nutrition data reviewed against USDA FoodData Central and Public Health England guidance by Jordan Morley, Editorial Reviewer. Last reviewed: 27 October 2026.

Fact-checked against original USDA source data by Jordan Morley, Editorial Reviewer. Not a registered dietitian — nutrition figures are sourced directly from USDA FoodData Central, not independently assessed medical advice.

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400
calories per 100g
120 calories per 0.75 cup (30g)
7.1gProtein
84.7gCarbs
3.3gFat
4.3gFibre

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⚖ Kitchen Scales

Quick reference — common serving sizes

AmountCaloriesProtein
1 oz (28g)113 kcal2.0g
100g400 kcal7.1g
grams
400kcal
7.1gprotein
84.7gcarbs
3.3gfat
4.3gfibre

A cereals ready-to-eat, frosted oat cereal with marshmallows contains 400 calories per 100g. A typical 0.75 cup (30g) provides about 120 calories. Cereals Ready-to-eat, Frosted Oat Cereal with Marshmallows is high in calories. Accurate tracking starts with weighing portions — a digital kitchen scale removes all the guesswork.

Cereals Ready-to-eat, Frosted Oat Cereal with Marshmallows Nutrition Facts

NutrientPer 100gPer serving (30g)
Calories400 kcal120 kcal
Protein7.1g2.1g
Carbohydrates84.7g25.4g
of which Sugars36.1g10.8g
Fat3.3g1.0g
of which Saturates0.6g0.2g
Fibre4.3g1.3g
Sodium533.0mg160mg
Potassium207.0mg62mg
Calcium333.0mg100mg
Iron15.0mg4.5mg
Vitamin C20.0mg6.0mg
Vitamin A500.0µg150µg
Selenium14.6µg4µg
Riboflavin (B2)1.5mg0.4mg

% of Daily Value (per 100g)

Based on a standard 2,000-calorie reference diet — the same basis used on nutrition labels in the US and UK.

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Have a cat or dog? Check whether cereals ready-to-eat, frosted oat cereal with marshmallows is safe for your dog or safe for your cat before sharing. Also check the full ingredient breakdown and food safety guide for pregnancy and storage advice. Use a meal prep container set to portion out cereals ready-to-eat, frosted oat cereal with marshmallows for the week. Tracking supplements too? Check drug and supplement interactions before combining anything new.

Good to know

Check the actual serving size on packaging before comparing to the per-100g figures here — snack portions are often smaller (or larger) than 100g.

Frequently Asked Questions

How many calories in cereals ready-to-eat, frosted oat cereal with marshmallows per 100g?

Cereals Ready-to-eat, Frosted Oat Cereal with Marshmallows contains 400 calories per 100g, based on USDA reference data.

Is cereals ready-to-eat, frosted oat cereal with marshmallows high in calories?

A 0.75 cup of cereals ready-to-eat, frosted oat cereal with marshmallows (30g) has around 120 calories — roughly 6% of a 2,000-calorie daily intake.

Is cereals ready-to-eat, frosted oat cereal with marshmallows good for weight loss?

Cereals Ready-to-eat, Frosted Oat Cereal with Marshmallows is fairly calorie-dense at 400 calories per 100g, so portion size matters when losing weight. A 0.75 cup provides about 120 calories.

How much protein is in cereals ready-to-eat, frosted oat cereal with marshmallows?

Cereals Ready-to-eat, Frosted Oat Cereal with Marshmallows contains 7.1g of protein per 100g.

Is cereals ready-to-eat, frosted oat cereal with marshmallows a good source of fibre?

Yes — cereals ready-to-eat, frosted oat cereal with marshmallows provides 4.3g of fibre per 100g, which is a meaningful contribution toward the commonly cited 28g daily reference intake.

How does cereals ready-to-eat, frosted oat cereal with marshmallows compare to cereals ready-to-eat, general mills, cheerios, yogurt burst?

Cereals Ready-to-eat, Frosted Oat Cereal with Marshmallows has 400 calories per 100g, close to cereals ready-to-eat, general mills, cheerios, yogurt burst at 400 — 0 calories fewer per 100g. See the full macro breakdown above.

How many servings of cereals ready-to-eat, frosted oat cereal with marshmallows for 20g of protein?

With 7.1g of protein per 100g, you'd need roughly 282g of cereals ready-to-eat, frosted oat cereal with marshmallows to reach 20g of protein

Foods with a similar calorie count

Other snacks closest to cereals ready-to-eat, frosted oat cereal with marshmallows by calories per 100g:

FoodCaloriesProteinCarbsFat
Cereals Ready-to-eat, Frosted Oat Cereal with Marshmallows (this page)400 kcal7.1g84.7g3.3g
Cereals Ready-to-eat, General Mills, Cheerios, Yogurt Burst400 kcal6.7g81.8g5.2g
Cereals Ready-to-eat, Post Honey Bunches Of Oats with Cinnamon Bunches400 kcal7.1g82.8g5.0g
Archway Home Style Cookies, Date Filled Oatmeal400 kcal4.7g68.2g12.1g
Archway Home Style Cookies, Raspberry Filled400 kcal4.3g65.9g13.3g
Archway Home Style Cookies, Strawberry Filled400 kcal4.3g65.9g13.3g
USDA Commodity, Bakery, Flour Mix400 kcal8.5g62.5g12.9g

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Last updated:

Nutrition data: USDA FoodData Central (public domain, CC0 1.0). Values are per 100g unless stated.