What Is a Latte? A Measured Caffè Latte Recipe

What Makes a Latte Different?

A latte is built around milk texture and proportion. Espresso provides the flavor base; steamed milk adds sweetness and body; a shallow layer of microfoam gives the surface a soft, glossy finish. Microfoam means very small bubbles dispersed through the milk, not a separate cap of stiff foam.

There is no single worldwide latte ratio. Cup sizes, basket doses and cafe conventions vary. On this page, ratios compare finished espresso mass with cold milk input mass so the numbers are repeatable at home. They do not describe the final aerated volume in the cup.

Measured Caffè Latte Recipe

This recipe fits a 220-240 ml cup and keeps the espresso identifiable beneath the milk. Weigh the espresso and cold milk separately; the finished drink will occupy more space after the milk is aerated.

Recipe Snapshot

• Yield: 1 latte
• Prep time: 3 minutes
• Cook time: 2 minutes
• Total time: 5 minutes
• Cup: 220-240 ml
• Starting ratio: About 1:4.2 finished espresso to cold milk input by mass

Ingredients

• 18 g coffee, ground for espresso
• 150 g cold whole milk

Equipment

• Espresso machine and grinder
• Espresso scale
• 350-450 ml milk pitcher
• 220-240 ml heatproof cup
• Thermometer, optional

Method

1. Preheat a 220-240 ml cup and prepare the espresso machine and portafilter.
2. Brew 18 g ground coffee to 36 g finished espresso in the preheated cup.
3. Pour 150 g cold whole milk into a 350-450 ml pitcher.
4. Aerate briefly, then maintain a stable vortex until the milk is glossy and reaches about 60 C (140 F).
5. Polish the milk, pour it into the espresso, and finish with a thin integrated microfoam layer.

Input-Basis Nutrition

The table calculates the full 150 g milk input plus 36 g espresso. A steamed drink may leave milk in the pitcher, so these are ingredient-input estimates rather than measured delivered-cup values.

The estimate uses generic USDA references for whole milk and espresso. Use the milk package label and measure what reaches the cup when an exact serving value matters. Contains milk; alternative milks need their own label calculation and steaming assessment.

Latte Ratio Guide

These ratios describe input masses, not final cup volume. Milk expands as air is incorporated, some remains in the pitcher, and crema changes the visible level in the cup.

How to Steam Milk for a Latte

1. Start cold: Cold milk and a cold pitcher give you more time to build fine bubbles.
2. Aerate briefly: Keep the steam tip near the surface only long enough to introduce a small amount of air.
3. Build a vortex: Submerge the tip slightly and keep the milk rolling so larger bubbles break down.
4. Stop by temperature: About 60 C (140 F) is a useful house target; avoid waiting for the milk to boil.
5. Polish and pour: Swirl the pitcher until the surface looks glossy, then pour before the foam separates.

A 2022 dairy study found that temperature affected foam properties in its tested milk and equipment setup. That research supports controlling temperature, but it does not create one universal endpoint for every milk or steam wand. Plant-based drinks can have different temperature limits, so follow the product guidance.

Choosing Espresso and Milk

Medium and medium-dark coffees often remain clear through milk because their cocoa, caramel and nut notes complement the milk's sweetness. Lighter espresso can work too, but an under-extracted shot may taste sharply sour once diluted.

Whole milk gives the recipe a round texture. Two-percent milk produces a lighter cup, while skim milk can make abundant foam with less body. Barista-style oat and soy drinks are practical alternatives, but sweetness, protein and stability vary. The best milk for coffee guide compares their behavior in more detail.

Latte vs. Cappuccino, Flat White and Cortado

How to Make a Latte Without an Espresso Machine

For a latte-style drink, brew about 50 g of concentrated coffee with a moka pot or a short AeroPress recipe. Heat 125 g milk, froth it with a French press or handheld frother, and combine. This is a useful home substitute, though its brewed-coffee base tastes different from espresso.

Latte Troubleshooting

Calories, Caffeine and Allergens

The input-basis nutrition table beside the recipe excludes syrups and toppings. Caffeine comes mainly from the espresso and cannot be inferred from shot volume. In one controlled all-Arabica espresso study, regular extractions made from 18.1-20.4 g dry doses contained about 152-174 mg caffeine. This is a planning reference, not a measurement of the 36 g house shot; species, blend, dose and extraction can put the result outside that range, especially when Robusta is present.

Dairy milk is a major allergen in the United States. Plant-based products may contain soy, tree nuts or other allergens, and shared steam wands can create cross-contact in cafes. Check labels and ask the cafe when an allergy is involved.

Common Questions

Bottom Line

A good latte is measured but not rigid. Begin with 36 g finished espresso and 150 g cold milk, create glossy microfoam near 60 C, then adjust only the milk amount until the coffee and sweetness feel balanced.

Sources and Further Reading