Costa Flat White: Price, Calories, Nutrition, Ingredients & Iced Flat White (2026)
The Costa Flat White is a popular espresso-based coffee for people who enjoy a stronger coffee flavour with smooth, textured milk. Costa Coffee describes it as a short but intense espresso combined with sweet, textured milk to create a rich and velvety drink.
Unlike a larger, milkier latte, a flat white is designed to keep the espresso flavour noticeable while delivering a smooth milk texture. You can order it hot or choose Costa’s separate Iced Flat White when you prefer a chilled coffee.
This guide covers the Costa Flat White menu, official UK nutrition figures, calories, ingredients, milk choices, syrups, allergens, prices and the difference between the hot and iced versions.
Costa Flat White at a Glance
| Detail | Information |
|---|---|
| Drink name | Costa Flat White |
| Brand | Costa Coffee UK |
| Drink type | Espresso-based hot coffee |
| Main ingredients | Espresso and textured milk |
| Official description | Short, intense espresso with sweet, textured milk |
| In-store serving | 241ml |
| Take-out serving | 262ml |
| Calories (in-store) | 151 kcal |
| Calories (take-out) | 164 kcal |
| Default milk shown | Whole milk |
| Coffee blend | Signature |
| Dietary information | Listed as vegetarian |
| Main declared allergen | Milk products |
| Available extras | Extra espresso shots and selected syrups |
Information is based on Costa’s UK Flat White product page. Drink customisations can change the final nutritional values.
What Is a Costa Flat White?
A Costa Flat White is an espresso coffee made with textured milk. It combines a concentrated coffee base with steamed milk to produce a smooth drink with a noticeable espresso taste.
Costa describes its Flat White as a short but intense espresso combined with sweet textured milk. The result is a rich, velvety coffee rather than a large drink dominated by milk.
It is a suitable choice if you enjoy the taste of espresso but prefer a softer texture than drinking espresso on its own.
Costa Flat White Ingredients
The standard Costa Flat White is made using two main components:
- Espresso: Provides the concentrated coffee flavour and forms the base of the drink.
- Textured milk: Steamed milk adds a smooth, creamy texture and balances the intensity of the espresso.
Costa’s product page shows its Signature coffee blend and whole milk as the standard selection. You can also explore available milk and plant-based beverage options when ordering.
The exact recipe and nutritional information may change if you select another milk, add an extra espresso shot or choose a flavoured syrup.
Costa Flat White Price in the UK
Costa does not publish one guaranteed nationwide price for every Flat White on its official product information page. The amount you pay may depend on the store, ordering channel and location.
| Drink | Price | Calories |
|---|---|---|
| Iced Flat White | £4.75 | 135 kcal |
| Flat White | £4.75 | 145 kcal |
For the most accurate price, check the Costa Coffee app or the menu at your nearest participating store before ordering.
| Ordering option | How to check the price |
|---|---|
| In-store | Check the displayed menu or ask a barista |
| Costa Coffee app | Select your store and view the current menu |
| Collection | Check the price shown during app ordering |
| Delivery | Check the delivery platform for your selected location |
Do not assume that a price shown by one delivery restaurant applies to every Costa branch.
Costa Flat White Calories
According to Costa’s UK nutrition information, a standard Flat White contains 151 calories when served in-store and 164 calories as a take-out drink.
The difference is partly because Costa lists different serving volumes for the two formats.
| Serving type | Drink size | Calories |
|---|---|---|
| In-store Flat White | 241ml | 151 kcal |
| Take-out Flat White | 262ml | 164 kcal |
These figures refer to the standard drink listed on Costa’s product page. Adding flavoured syrup or extra espresso shots, or changing the milk, may affect the final nutritional information.
Costa Flat White Nutrition Information
Here is the official nutritional breakdown for Costa’s standard UK Flat White.
| Nutritional Information | Per 100ml | In Store (241ml) | Take-Out (262ml) |
|---|---|---|---|
| Energy (kJ) | 260 | 626 | 683 |
| Energy (kcal) | 62 | 151 | 164 |
| Fat (g) | 3.5 | 8.3 | 9.2 |
| of which saturates (g) | 2.2 | 5.3 | 5.9 |
| Carbohydrate (g) | 4.7 | 11 | 12 |
| of which sugars (g) | 4 | 9.5 | 10 |
| Protein (g) | 3.2 | 7.7 | 8.4 |
| Salt (g) | 0.10 | 0.24 | 0.26 |
The table is useful if you are comparing the in-store and take-out portions or checking the drink’s energy, fat, sugar and protein content.
Costa Flat White Syrup and Flavour Options
Costa’s Flat White product page lists several syrup choices that customers can use to customise their drink. The available selection includes:
| Syrup option | Flavour |
|---|---|
| None | Original coffee and milk taste |
| Caramel | Sweet caramel flavour |
| Vanilla | Smooth vanilla flavour |
| Hazelnut | Nutty-style flavour |
| Sugar Free Caramel | Caramel-style flavour without sugar in the syrup |
| Sugar Free Vanilla | Vanilla-style flavour without sugar in the syrup |
| Sugar Free Gingerbread | Gingerbread-style flavour |
| Sugar Free Cinnamon Bun | Cinnamon bun-style flavour |
Syrup availability can vary by store and may change with seasonal menu updates. These are customisation options, not separate standard Flat White drinks.
Adding syrup can change the drink’s sugar and calorie content. If you are monitoring your intake, check the customised drink’s nutrition information before ordering.
Costa Iced Flat White
If you prefer cold coffee, Costa also lists an Iced Flat White on its UK menu.
Costa describes this drink as an intense cortissimo shot blended with milk and topped with whipped milk foam. It is different from the standard hot Flat White because it is served chilled and includes a whipped milk topping.
Iced Flat White Calories and Nutrition
Costa’s published nutrition information gives the Iced Flat White a serving size of 220ml and 65 calories.
| Nutritional Information | Per 100ml | Per Portion (220ml) |
|---|---|---|
| Energy (kJ) | 124 | 273 |
| Energy (kcal) | 30 | 65 |
| Fat (g) | 1.1 | 2.4 |
| of which saturates (g) | 0.7 | 1.5 |
| Carbohydrate (g) | 3.1 | 6.8 |
| of which sugars (g) | 2.2 | 4.9 |
| Protein (g) | 2 | 4.4 |
| Salt (g) | 0.06 | 0.14 |
Important: Costa specifically states that its Iced Flat White cannot be made dairy-free, even when a dairy alternative is selected, because other ingredients in the drink contain milk. Always check the current product page before ordering if you have dietary requirements.
Costa Flat White vs Latte vs Cappuccino
Although all three drinks use espresso and milk, they have different textures and proportions. A Flat White is generally a smaller, espresso-forward drink, while a latte has more milk and a cappuccino has a more prominent foamy texture.
| Drink | Main difference | Best for |
|---|---|---|
| Flat White | Short espresso with smooth textured milk | A stronger coffee taste in a smaller drink |
| Latte | Espresso with more steamed milk | A milder, milkier coffee |
| Cappuccino | Espresso with steamed milk and a more noticeable foam layer | A coffee with a lighter, foamy texture |
If you prefer a stronger coffee taste without ordering a straight espresso, the Flat White is worth considering.
Can You Customise a Costa Flat White?
Yes. Costa’s official Flat White page lists options for milk, espresso shots and syrups.
Milk choices
Costa’s product page provides a milk and plant-based beverage selection. The options shown may depend on the store and current menu. If you choose a dairy alternative, tell the barista clearly and check the allergen information if you have an allergy.
Extra espresso shots
The standard product page shows no extra shots selected. Customers can check whether an additional espresso shot is available when ordering. Adding a shot will change the strength and may change the caffeine content.
Syrups
You can choose from the listed syrup options, including caramel, vanilla, hazelnut and selected sugar-free flavours. Availability is not guaranteed at every branch.
Is Costa Flat White Vegetarian or Vegan?
Costa lists its standard Flat White as vegetarian. However, the standard version contains milk, so it is not vegan as served.
Choosing a plant-based milk alternative does not automatically make every customised drink suitable for vegans or people with allergies. Check the ingredients and current allergen information for your chosen combination.
The Iced Flat White requires particular attention: Costa states that it cannot be made dairy-free because its whipped milk foam contains milk.
Costa Flat White Allergens
Costa’s official product page identifies milk products as an allergen present in its standard Flat White.
| Allergen | Standard Flat White |
|---|---|
| Milk products | Present |
Costa also warns that it cannot guarantee its products are completely free from allergens because drinks are prepared using shared equipment in busy stores.
If you have a milk allergy or another food allergy, tell the barista before ordering and ask to see the current Product Allergen and Nutritional Information guide. Do not rely only on choosing a plant-based milk alternative, as cross-contact may still occur.
How to Order a Costa Flat White
You can order a Flat White at a participating Costa Coffee store or through the Costa Coffee app.
- Open the Costa Coffee app or visit a participating store.
- Find Flat White in the coffee menu.
- Select the available milk option.
- Choose whether you want an additional espresso shot.
- Add a syrup if you want a flavoured coffee.
- Review the displayed price and order details.
- Confirm your order.
If you have an allergy or intolerance, tell the barista before the drink is prepared.
Is Costa Flat White Worth Trying?
The Costa Flat White is a good option for people who enjoy espresso but want a smoother, milk-based coffee. Its smaller serving size and espresso-forward character make it different from a larger latte.
It may suit you if you:
- Prefer a noticeable coffee flavour.
- Enjoy smooth, textured milk.
- Want a smaller alternative to a latte.
- Prefer a simple coffee without chocolate or a heavy topping.
- Want the option to customise your drink with syrup or an extra shot.
If you prefer cold coffee, Costa’s Iced Flat White is a separate menu choice, although its whipped milk topping means it is not suitable for a dairy-free order.
Frequently Asked Questions
How many calories are in a Costa Flat White?
A standard Costa Flat White contains 151 kcal for an in-store 241ml serving and 164 kcal for a 262ml take-out serving, according to Costa’s UK nutrition information.
How much is a Costa Flat White?
Costa does not list one fixed nationwide price on its official Flat White product page. Check the Costa app or your local store for the current price.
What is in a Costa Flat White?
A Costa Flat White combines espresso with sweet, textured milk. Costa’s standard product selection shows its Signature coffee blend and whole milk.
Is a Costa Flat White strong?
It has a noticeable espresso flavour and is described by Costa as a short but intense coffee. Its taste is generally more espresso-forward than a milkier latte.
Does Costa do an Iced Flat White?
Yes. Costa lists a separate Iced Flat White on its UK menu. It contains an intense cortissimo shot, milk and whipped milk foam.
How many calories are in a Costa Iced Flat White?
Costa lists 65 kcal for its 220ml Iced Flat White serving.
Is Costa Flat White vegan?
The standard Flat White is not vegan because it contains milk. The Iced Flat White also cannot be made dairy-free because its whipped milk foam contains milk.
Is Costa Flat White vegetarian?
Yes. Costa identifies its standard Flat White as suitable for vegetarians.
Does Costa Flat White contain milk?
Yes. Costa lists milk products as an allergen present in its standard Flat White.
Can I add syrup to a Costa Flat White?
Yes. Costa lists options such as caramel, vanilla, hazelnut and selected sugar-free syrups. Availability may vary by store.
Is a Costa Flat White stronger than a latte?
A Flat White is generally more espresso-forward and smaller than a latte, so its coffee flavour can taste stronger. The exact strength also depends on the recipe and any extra shots.
What size is a Costa Flat White?
Costa lists an in-store serving of 241ml and a take-out serving of 262ml on its official UK product page.
Final Thoughts
Costa Flat White is a straightforward espresso and textured-milk coffee for customers who prefer a rich, smooth drink with a noticeable coffee taste. Costa’s official UK figures list 151 kcal for an in-store serving and 164 kcal for take-out.
For a cold alternative, Costa also offers an Iced Flat White with 65 kcal per 220ml portion. Before ordering, check the latest menu, local price and allergen information, especially if you plan to change the milk or add flavourings.
Official information: Costa Flat White | Costa Iced Flat White | Costa Nutrition & Allergens