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Oat Milk Latte: Recipe, Calories and Sugar Explained

By Mara EllisonReviewed by Online Coffee Guide editorial teamPublished Updated 5 min read

An oat milk latte combines espresso with warmed, lightly foamed oat drink. It has a cereal-like flavor and a rounded texture; choosing a carton you enjoy with coffee matters as much as choosing one that foams well.

Latte with rosetta foam in a white cup beside a small dish of rolled oats.
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Drink Snapshot

Caffeine
75 mg reference36 g generic prepared espressoGeneric espresso reference; actual caffeine is unmeasured. Milk does not remove it.
Calories
Estimated 110 kcalOatly US Barista Edition, 32 oz carton180 ml (6.1 US fl oz) cold plant drink plus 36 g generic espresso. Ingredient estimate; no syrup or garnish.
Serving, sugar and sources
Serving
1 latte: 36 g prepared espresso + 180 ml (6.1 US fl oz) cold oat milk; no syrup
Made with
Espresso and lightly foamed oat milk
Sugar
Estimated 5.3 g total. The US label also declares these as added sugars from oat processing. No separate sweetener is added in the recipe.
Preparation
About 5 minutes with equipment ready

Named-product estimate: 2.3 g protein. Milk is measured by volume before heating, espresso by mass. See the full calculation or label comparison.

Key Takeaways

  • 1Choose the oat drink for its cereal flavor and sweetness as well as its foam.
  • 2For an iced latte, focus on taste and body; steaming performance matters less when the milk stays cold.
  • 3Shake the carton as directed and measure the cold oat drink before heating; follow its own temperature guidance.
On This Page10 Sections

Barista Oat Milk vs. Regular Oat Milk

Oatly US Barista Edition contains oil and an acidity regulator intended to help it combine with hot drinks. Its label also declares sugars created during oat processing. That is why the ingredient list and nutrition panel answer different questions: no separate spoonful of sugar does not mean zero sugar in the carton.

Compare the two named cartons at the same 180 ml (6.1 US fl oz) cold portion.

Barista oat milk vs regular oat milkScrollable table
Barista oat milk vs regular oat milk
Named productCalories from 180 ml (6.1 US fl oz)Total sugarsProtein
Oatly US Barista Edition, 32 oz carton105 kcal5.3 g2.3 g
Oatly US Chilled Unsweetened, 64 oz carton30 kcal0 g labelled0 g labelled

These are oat-drink contributions only; espresso is excluded. Both the Barista Edition and Unsweetened labels use a 240 ml (8.1 US fl oz) serving. Label rounding still applies, including to values shown as zero. The lower-calorie carton is a different formulation, so identical steaming performance should not be assumed.

Oat Milk Latte Recipe

Cup: at least 250 ml (8.5 US fl oz), with room for foam.

Recipe

Oat Milk Latte

Makes:
1 latte
Time:
About 5 minutes; equipment ready

Ingredients

  • 18 g coffee, ground for espresso, to yield 36 g espresso
  • 180 ml (6.1 US fl oz) cold barista oat milk

Equipment

  • Espresso machine with steam wand
  • Grinder and tamper
  • Scale
  • Graduated measuring jug
  • Milk pitcher suited to 180 ml milk
  • Thermometer
  • Heatproof cup of at least 250 ml (8.5 US fl oz)

Method

  1. Measure. Shake the closed carton as directed. Measure 180 ml (6.1 US fl oz) cold oat milk into a suitable pitcher; choose a cup of at least 250 ml (8.5 US fl oz).
  2. Brew. Extract 18 g ground coffee to 36 g espresso in the cup. Adjust the grind for your beans and machine.
  3. Texture and pour. Steam the milk gently to 60–65°C (140–149°F), unless your carton advises otherwise. Add little air for fine foam. Turn off the steam before removing the wand, then wipe and purge it. Swirl the pitcher, pour all the milk into the espresso and serve.

Estimated nutrition: 110 kcal · 5.3 g total sugar. Per latte, using Oatly US Barista Edition and no added syrup.

Cold oat drink measured and steamed to fine foam, then poured into espresso.
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Measure oat milk cold and follow the carton’s heating guidance before pouring.

Prepare the shot using the espresso method.

The coffee ratio is 18 g dry grounds to 36 g prepared espresso, both measured by weight. The oat milk is measured by volume before heating; 180 ml (6.1 US fl oz) is not assumed to weigh 180 g. The 250 ml (8.5 US fl oz) cup is capacity, not a promise about finished yield.

Use a pitcher suited to the 180 ml (6.1 US fl oz) portion and serve that portion. Extra milk used to meet a machine's minimum fill is preparation stock; if you pour more into the drink, the nutrition changes. The temperature above is a home starting range. Alpro specifies 65°C (149°F) for its own Barista Oat; your product's directions take priority.

Without an Espresso Machine or Steam Wand

Heat the measured milk gently in a saucepan, use a handheld frother briefly, then swirl. Avoid a deep cap of stiff bubbles. 40 ml (1.4 US fl oz) strong moka-pot coffee is a practical coffee-base alternative; it will taste different and the espresso caffeine reference no longer describes it.

What Does an Oat Milk Latte Taste Like?

An oat milk latte has a cereal-like flavor around the espresso, often with a gentle sweetness even before syrup. The barista drink used here gives it a rounded body and fine foam. Other oat formulations can feel lighter or taste less sweet, so changing the carton can change the latte as much as changing the coffee.

I taste the oat drink with espresso before letting a barista label decide because good foam matters less to me if the finished latte is too sweet.

Oat Milk Latte Calories, Sugar and Caffeine

The defined Barista Edition recipe has an estimated 110 kcal, 5.3 g total sugar and 2.3 g protein, with 75 mg reference caffeine. It includes the 180 ml (6.1 US fl oz) US oat-drink portion above plus 36 g prepared espresso, with no syrup or topping. Those sugar grams are declared as added sugars on the US oat-drink label; no additional sweetener is added in this recipe.

Serving calculation and sources

The 180 ml milk portion is 0.75 of each 240 ml label serving.

For the coffee contribution, USDA's generic prepared-espresso record, FDC 171891, lists 9 kcal and 0.12 g protein per 100 g. At 36 g that adds 3.24 kcal and 0.04 g protein: 105 + 3.24 = 108.24 kcal, rounded to 110. With the named Unsweetened carton instead, the same calculation gives 35 kcal after rounding. These are ingredient estimates, not measured drink values.

USDA’s 212 mg caffeine per 100 g gives 76.32 mg for 36 g espresso, rounded to 75 mg. Beans, dose and extraction change the actual amount. A decaf latte is the closer option when caffeine reduction is the aim.

Is an Oat Milk Latte Healthy?

Compare the carton's sugar, protein and fortification, then consider your milk portion and any syrup. This latte supplies an estimated 2.3 g protein with the named carton. The FDA recommends comparing the actual nutrient labels, since plant-based drinks differ in calories, protein and added nutrients.

Oat Milk Latte vs. Almond Milk Latte

An almond milk latte brings a different plant flavor. The Alpro UK Barista Almond example contributes about 43 kcal, 4.5 g sugar and 0.9 g protein from the same 180 ml (6.1 US fl oz) portion. That is a comparison of these two specific products from different markets, not a universal oat-versus-almond rule.

For a protein-focused comparison, check the named carton in our soy latte guide. Keep the coffee and milk portion fixed when comparing; cup size, syrups and shot count can overwhelm the milk difference.

How to Froth Oat Milk and Fix Separation

Add only a little air while heating, then swirl for a fine, pourable texture. Follow your carton's temperature guidance and use the table to adjust one thing at a time.

How to Froth Oat Milk and Fix Separation
How to Froth Oat Milk and Fix Separation
What happensFirst adjustment
Foam is stiff and dryAdd less air at the start; swirl to integrate the bubbles
Foam drains away quicklyCompare a coffee-specific formulation; do not keep aerating indefinitely
Drink separates only after meeting espressoFollow the carton temperature, then change the coffee or formulation one at a time
Oat flavor overwhelms coffeeReduce the milk portion to 150 ml (5.1 US fl oz) for the next cup
Latte tastes sweet before syrupCheck the total-sugar panel, including processing-derived sugars

Iced Oat Milk Latte

Use 36 g prepared espresso, 150 ml (5.1 US fl oz) cold oat milk and 100 g (3.5 oz) ice in a glass of at least 350 ml (11.8 US fl oz). Add milk and ice, then the espresso and stir. Skip steaming; the smaller milk portion leaves room for ice.

Using the same US Barista carton, that version has an estimated 90 kcal, 4.4 g sugar and 1.9 g protein, before any syrup. Ice adds water as it melts, not calories. For the general assembly method, see iced latte; for deliberate vanilla sweetness, see vanilla latte.

For a different cold preparation, brown sugar oatmilk shaken espresso shakes the coffee with ice before adding a smaller oat-drink portion.

Common Questions

Is an oat milk latte dairy-free and vegan?
Plain espresso and a suitable oat drink make a plant-based base. Check flavored sauces and toppings separately; a café's oat option does not describe everything else in the cup.
Is an oat milk latte gluten-free?
Check the specific local carton. The Oatly US product used here is labelled gluten-free, while some other oat drinks carry different cereal warnings. Do not generalize across brands or countries.
Can regular oat milk make a latte?
Yes. It may produce a different body or less stable foam than a coffee-specific blend. For an iced latte, steaming performance is less important because the milk stays cold.
How do I order one?
Ask for a latte with oat milk, then specify hot or iced, size, espresso shots and any syrup. Ask which carton is used if sweetness or protein matters to you.

Editor's Take

Sources and Further Reading

6 references

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