How much caffeine is in M&M's Milk Chocolate?

One cup (208 g) of M&M's Milk Chocolate has 29 mg of caffeine.

You would need about 3.5 of these to equal a cup of brewed coffee (95 mg).

Source: USDA FoodData Central · checked 10 Nov 2026

When did you have it?

Had at 3 pm, about 10 mg is still in you at an 11 pm bedtime. That should not affect most people’s sleep.

Bedtime

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Per 100 g that is about 14 mg of caffeine.

Latest time to eat it

For an 11 pm bedtime, one cup (208 g) of M&M's Milk Chocolate stays under the 50 mg most people sleep fine with, even late in the evening. The table works it out for other bedtimes and for how sensitive you are: it is the latest time to start one so that the caffeine left stays under the line all night.

Bedtime	Very sensitive under 25 mg	Average under 50 mg	Not very sensitive under 100 mg
9 pm	Any time	Any time	Any time
10 pm	Any time	Any time	Any time
11 pm	Any time	Any time	Any time
Midnight	Any time	Any time	Any time
1 am	Any time	Any time	Any time

For one cup (208 g) of M&M's Milk Chocolate, average clearance (half-life 5 h), 8 hours of sleep. "Any time" means even one at bedtime stays under the line.

How long it lasts

The caffeine from one cup (208 g) of M&M's Milk Chocolate peaks in your blood about 75 minutes after you start it, at roughly 25 mg. Half of it is gone in about 5 hours for an average adult; that ranges from roughly 3 to 7 hours, and longer in pregnancy or with some medicines.

Time after	3 hours	6 hours	9 hours	12 hours
Still in you	20 mg	13 mg	8.9 mg	5.9 mg

So one had at 3 pm leaves about 10 mg at 11 pm. How long caffeine lasts explains the curve.

How it compares

M&M's Milk Chocolate is stronger than 75% of the 37 foods we track, by caffeine per serving.

Per fluid ounce (4.3 mg) it is stronger than 100% of them.

To reach 400 mg in a day you would need about 14 of these.

Less caffeine

Dark Chocolate 23 mg, 1 oz, 70-85% cacao
Chocolate Chip Muffin 20 mg, 1 large muffin
Chocolate-Covered Almonds 19 mg, 1 cup

More caffeine

Flourless Chocolate Cake 30 mg, 1 cup
Coffee Ice Cream 30 to 50 mg, 2/3 cup, super-premium
Awake Caffeinated Chocolate 50 mg, 1 bite

FAQ

Is M&M's Milk Chocolate high in caffeine?

No, it is low. One cup (208 g) of M&M's Milk Chocolate has 29 mg, which is 31% of the 95 mg in an 8 fl oz cup of brewed coffee.

Can I eat M&M's Milk Chocolate at night?

For most people, yes: even late in the evening one cup (208 g) of M&M's Milk Chocolate stays under 50 mg at an 11 pm bedtime.

How long does the caffeine in M&M's Milk Chocolate last?

It peaks about 75 minutes after you start it. Of the 29 mg, about 13 mg is still in you 6 hours later and 5.9 mg after 12 hours, for an average adult with a 5-hour half-life.

Does M&M's Milk Chocolate have more caffeine than a cup of coffee?

No. One cup (208 g) of M&M's Milk Chocolate has 29 mg; an 8 fl oz cup of coffee has 95 mg.

Method and limits

The caffeine figure comes from USDA FoodData Central; recipes, brewing and batches vary, so a real serving can differ. The curves use a standard one-compartment model with an average 5-hour half-life and a sleep-friendly line of 50 mg; your own body may clear caffeine faster or slower. How it works has the details.

These are estimates for information, not medical advice.

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