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Red Eye Coffee: Recipe, Caffeine and Americano Comparison

By Jason HarrisReviewed by Online Coffee Guide editorial teamPublished Updated 5 min read

Red eye coffee is brewed coffee with one espresso shot added. It combines two coffee preparations in one mug; an Americano uses water instead of the brewed base. The recipe below defines the portions so the caffeine comparison is useful.

Espresso being poured into a mug of brewed black coffee
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Drink Snapshot

Caffeine
About 159 mg (reference)Mayo Clinic: 96 mg brewed + 63 mg espressoReference for the two prepared-coffee portions.
Calories
About 5 kcalDefined plain serving; generic USDA coffee recordsComposition estimate with stated fluid-ounce conversion. Milk, cream, sugar and syrup excluded.
Serving, sugar and sources
Serving
237 ml (8 US fl oz) brewed coffee + 30 ml (1 US fl oz) espresso; 267 ml (9 US fl oz) before additions
Made with
Brewed black coffee + 30 ml (1 US fl oz) prepared espresso
Sugar
0 g (reference). Both plain coffee records list zero sugar; no sweetener is added.
Preparation
About 8 minutes; equipment ready

Mayo Clinic caffeine references and USDA ingredient calculations. Volumes are prepared coffee served. Checked 25 September 2026. See the full calculation or label comparison.

Key Takeaways

  • 1A red eye uses brewed coffee plus espresso; Americano and long black use water plus espresso.
  • 2Our home serving uses 237 ml (8 US fl oz) brewed coffee and 30 ml (1 US fl oz) espresso, with about 5 kcal and 0 g sugar before additions.
  • 3The 159 mg caffeine example comes from named reference portions.
On This Page10 Sections

Red Eye vs. Black Eye, Dead Eye and Americano

A red eye adds espresso to brewed coffee, not to water. Breville's drink guide describes the familiar one-, two- and three-shot naming convention.

Red Eye vs Black Eye, Dead Eye and AmericanoScrollable table
Red Eye vs Black Eye, Dead Eye and Americano
DrinkCommon orderUseful clarification
Red eyeBrewed coffee with one espresso shotAsk for the brewed cup size and the café's shot portion
Black eyeBrewed coffee with two shotsTwo singles and two modern doubles are not necessarily equivalent
Dead eyeBrewed coffee with three shotsConfirm the total espresso served
AmericanoEspresso with waterWater adds volume without adding another coffee's caffeine

A long black also uses water rather than brewed coffee. Red eye versus black coffee is a different comparison: ordinary black coffee has no added espresso. Neither a dark appearance nor a bitter taste measures caffeine.

Red Eye Coffee Recipe

One mug, about 8 minutes with the equipment ready. This example uses 237 ml (8 US fl oz) brewed coffee and 30 ml (1 US fl oz) prepared espresso, 267 ml (9 US fl oz) before additions. A 350 ml (11.8 US fl oz) mug supplies headroom; it is not the drink yield. The coffee quantities are measured after brewing, not the water poured into either brewer.

One-Mug Red Eye

Recipe

One-Mug Red Eye

Makes:
1 serving
Time:
About 8 minutes; equipment already warm

Ingredients

  • 237 ml (8 US fl oz) freshly brewed black coffee, measured after brewing
  • 30 ml (1 US fl oz) freshly prepared espresso

Equipment

  • Drip or pour-over brewer, espresso equipment, volume measure, spoon and 350 ml (11.8 US fl oz) mug

Method

  1. Brew coffee with your usual drip or pour-over method. Measure 237 ml (8 US fl oz) finished coffee into a warmed 350 ml (11.8 US fl oz) mug.
  2. Prepare espresso with your usual balanced recipe. Stir, let the crema settle briefly and measure a 30 ml (1 US fl oz) portion; do not force the extraction to reach a volume.
  3. Add the espresso to the brewed coffee, stir gently and serve. Milk and sweetener are optional additions outside this base recipe.

Estimated nutrition per serving: 5 calories; total sugar 0 g. Serving: 267 ml (9 US fl oz) before additions; 350 ml (11.8 US fl oz) mug capacity.

Recipe notes

Use freshly prepared brewed coffee and espresso.

Volumes are prepared coffee served, not brew-water input. Milk and sweetener are excluded.

Prepare the base with the drip-coffee method and the added shot with the espresso method, then measure the finished portions.

A pour-over brewer and a prepared espresso beside a mug
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Brew the two coffees separately, then measure the finished portions; the pictured vessels do not establish their volumes.

If you brew espresso by weight: keep the extraction that works for your basket and coffee, then measure the prepared amount for this recipe. The espresso ratio guide covers mass-based extraction separately.

Flavor and Tasting Notes

The brewed base supplies most of this mug's volume. Espresso adds concentrated coffee flavor, but the result depends on both preparations. It need not taste burnt or especially bitter.

I ask which brewed coffee and espresso go into a red eye. Adding a dark, roasty shot to an already dark brew can give me more bitterness than I want; the pairing matters as much as the extra coffee volume.

If the espresso gets lost, try 177 ml (6 US fl oz) brewed coffee with the same 30 ml (1 US fl oz) espresso. The smaller base changes the balance without adding another shot.

Red Eye Coffee Caffeine, Calories and Sugar

How the 159 Mg Reference Is Calculated

Mayo Clinic lists 96 mg caffeine per 237 ml (8 US fl oz) brewed coffee and 63 mg per 30 ml (1 US fl oz) espresso. For this defined recipe, 96 + 63 = 159 mg. The home drink has not been measured; beans, dose, brewing and the espresso portion can change the actual amount.

How the 159 mg Reference Is CalculatedScrollable table
How the 159 mg Reference Is Calculated
Defined comparisonReference calculationApproximate caffeine
This red eye: 237 ml (8 US fl oz) brewed + 30 ml (1 US fl oz) espresso96 + 63159 mg
Smaller red eye: 177 ml (6 US fl oz) brewed + 30 ml (1 US fl oz) espresso96 × 177 ÷ 237 + 63135 mg
Same-espresso Americano: 237 ml (8 US fl oz) water + 30 ml (1 US fl oz) espresso0 + 6363 mg

Our portion analysis: switching the defined base from brewed coffee to water removes the brewed component's reference 96 mg. Adding water to an already mixed red eye only dilutes it; it does not remove its caffeine. A larger, multi-shot Americano can exceed a smaller red eye, so this table is not a ranking of every café drink.

Red Eye and Americano examples with the same 30 ml espresso: brewed coffee gives a 159 mg caffeine reference, while water gives 63 mg
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Mayo Clinic references compare the same espresso portion added to brewed coffee or water.

Plain Coffee Has Few Calories; Additions Count Separately

The two-ingredient serving is about 5 kcal and 0 g sugar by generic USDA references.

Serving calculation and sources

Prepared brewed coffee (FDC 171890) supplies 1 kcal per 100 g; prepared espresso (171891) supplies 9 kcal per 100 g. Both records list 0 g sugar. Their household fluid-ounce weight references give approximately 2.4 kcal from the base and 2.7 kcal from espresso.

Milk, cream and syrup add their own calories and sugar. A plain red eye has no added sugar; a sweetened order needs a new total.

Is It Too Much Caffeine?

Count the whole day's sources, not just this mug. The FDA explains that sensitivity varies and that some conditions and medicines change what is appropriate. Its general adult guidance is not a personalized allowance. If pregnant, trying to become pregnant or breastfeeding, discuss caffeine with your clinician.

Red Eye Coffee Troubleshooting

Red Eye Coffee Troubleshooting
Red Eye Coffee Troubleshooting
ProblemPractical adjustment
Harsh or scorched tasteTaste each coffee separately; replace an over-held base or correct the espresso first
Espresso barely changes the cupTry the smaller 177 ml (6 US fl oz) base with the same 30 ml (1 US fl oz) espresso
Sharp or sourCheck the individual extractions before masking them with sugar
Mug overflowsMeasure the finished coffee and leave space for espresso and any milk
Iced version tastes wateryChill the brewed base before assembly instead of asking the ice to cool a full hot mug

Iced and Decaf Red Eye Coffee

Iced red eye: use 237 ml (8 US fl oz) chilled brewed coffee, 30 ml (1 US fl oz) espresso and 120 g (4.2 oz) serving ice in a glass of at least 450 ml (15.2 US fl oz). Leave headroom and stir. Chilling takes extra time; the hot recipe's eight-minute estimate excludes it. Ice changes dilution, not the caffeine already poured. See iced coffee for preparing a chilled base. Cold-brew concentrate requires its own dilution and caffeine information.

Decaf or half-caf: specify both components. A decaf espresso added to regular brewed coffee leaves the regular base intact. For a lower-caffeine version, ask for decaf brewed coffee and decaf espresso; decaf coffee still contains some caffeine. “Half-caf” needs a clear explanation of which coffee is being changed.

At a café: ask for “brewed coffee with one espresso added,” then name the size and any milk. This also avoids relying on chain-specific nicknames or assuming the same shot size everywhere.

History and Culture

Breville associates the name with overnight red-eye flights. The ingredient definition is more dependable than a dramatic origin story.

Common Questions

How many shots are in a red eye?
Commonly one espresso shot added to brewed coffee. This home example defines that addition as 30 ml (1 US fl oz) prepared espresso.
Is red eye coffee the same as an Americano?
No. An Americano combines espresso with water; a red eye uses brewed coffee as its base. The exact portions determine their caffeine totals.
Can I make it without an espresso machine?
A moka pot or concentrated brewed coffee can make a variation, but it is not the same extraction as espresso. Do not reuse the espresso caffeine reference for that substitute.
Is it black coffee?
It is normally served black unless milk is requested, but it contains both brewed coffee and added espresso. Plain black coffee does not necessarily include the espresso addition.
Does a decaf shot make the whole drink decaf?
No. The brewed base must also be decaf, and even an all-decaf version can retain caffeine.

Editor's Take

Sources and Further Reading

5 references

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