I’ve gone through the nutritional information available here and condensed it down to this list. If in doubt, though ask your barista.
Items marked with a (c) are gluten-free in themselves but the place that makes them also processes gluten.
Cakes
All contain gluten that is in the display case. Be careful as if something in the cabinet is labelled as “gluten-free” as there is also no way to stop cross-contamination when displayed alongside gluten-containing products.
Hot Drinks
Avoid getting a drink made with oat milk as it is not gluten-free.
Festive Favourites
- Irish Velvet Latte & Cream
- Cinnamon spiced Cappuccino
- Black Forest Hot Chocolate and Cream
- Irish Velvet Hot Chocolate and Cream
Coffee
- Mocha Italia Espresso
- Character Roast Espresso
- Ristretto
- Espresso Macchiato
- Esspresso Con Panna
- Cortado
- Mocha Cortado
- Caramel Cortado
- Americano
- Flat Black
- Premium Filter Coffee
- Latte
- Honeycomb Latte Machiatto
- Cappuccino
- Honeycomb Cappucino
- Flat White
- Mocha
Teas
- English Breakfast Tea
- Decaf Tea
- Earl Grey Tea
- Jasmine Tea
- Pure Green Tea
- Mint Infusion
- Fruit Infusion
Hot Chocolate
- Classic hot chocolate
- White Hot Chocolate
- Ruby Cocoa Hot Chocolate & Cream
- Hot Chocolate Babyccino with marshmallow
Other Hot Drinks
- Chai Latte
- Milk Babyccino
Cold Drinks
- Iced Espresso
- Iced Espresso Macchiato
- Iced Cortado
- Iced Mocha Cortado
- Iced Americano Black
- Iced Cappuccino
- Iced Cappuccino (with whipped milk)
- Iced Cappuccino (shaken)
- Honeycomb Iced Cappuccino
- Iced Latte (standard)
- Honeycomb Latte (shaken)
- Iced Latte base for speciality latte (without Gomme syrup)
- Iced Flat White with whipped milk
- Iced Mocha
- Iced Chocolate
- Iced Chai Latte
Coffee Frostinos
- Coffee Frostino
- Belgian Chocolate & Cream Frostino with coffee
- Salted Caramel & Cream Frostino with & without coffee
- Honeycomb Frostino with Light Dairy Swirl with & without coffee
- Belgian Chocolate & Cream Frostino
- Strawberry & Cream Frostino
- Mint Choc Chop Frostino & Cream
Cold Brew Coffee (CBC)
- CBC Black
- CBC with whipped milk
- CBC white
- Strawberry CBC
- Honeycomb CBC
Fruit Coolers
- Red Summer Berries Fruit Cooler
- Mango & Passionfruit Fruit Cooler
Treats at the till
- Dark Chocolate Bar (c)
- Milk Chocolate Bar (c)
- Belgian Chocolate Brownie (c)
- Mini Cherry Bakewells (c)
- Natural Mixed Nuts
- Milk Chocolate Raisins
- Protein Nut Mix
- Honey Roasted Peanuts & Cashews
- Millionaires Shortbread
- Milk Chocolate Medal
- Mince Tart
- Vegan Sugar-Free Gummy Bears
- Christmas Slice
Hot Meals
- Tomato & Basil Soup
- Creamy Mushroom Risotto
- Vegan Butternut Squash Risotto
Breakfast
- Mixed Berry Compote
Drinks Additions & Ingredients
- Vanilla Syrup
- Roasted Hazelnut Syrup
- Caramel Syrup (both original and sugar-free)
- Gingerbread Syrup (sugar-free only)
- Whipping Cream
- Light Dairy Swirl
- Chocolate Flake
- Marshmallows
- All cow milk
- Lacto-free semi-skimmed milk
- Soya Drink
- Coconut Drink
- Almond Drink
- Chai syrup
- Gomme Syrup
- Mint Syrup
- Black Cherry Syrup
- Salted Caramel Sauce
- White Chocolate Sauce
- Belgian Chocolate Sauce
- Caramel Flavour Syrup
- Irish Coffee Flavour Sauce
- Strawberry Sauce
- Red Shimmer Chocolate Curls
- Cappuccino Dusting
- Chocolate Chip Pieces
- Golden Twinkle Sprinkle
- Cinnamon Powder
- Frostino Base Powder
- Spiced Capuccino Dusting
- Hot Chocolate Powder
- Ruby Cocoa Hot Chocolate Powder
Gluten Free Life 
Hello there! I am also medically gluten-free (coeliac disease), and I had gastrointestinal symptoms of coeliac disease (bloating, cramps, abdominal pain) after drinking two sips of a ‘gluten-free’ hot chocolate from Costa Coffee today. When I asked the barista, she highlighted that “they cannot ensure that no cross-contamination occurs”, and even if you avoid oat milk in your order, they use the same steam wands as oat milk, hence incurring cross-contamination; how they are legally allowed to define this as gluten-free beats me in this case! They claim that they ‘purge’ the steam wand, but this did not stop cross-contamination in this case.
Even trace amounts of gluten can cause an autoimmune reaction and therefore physical damage to the small intestine of coeliacs, and it is really important that people with coeliac disease are aware of the gluten contamination that can occur at Costa Coffee, and any coffee chain that serves oat milk but does not separate milk types properly. If in doubt, ask the barista at the specific coffee shop and emphasise the term ‘coeliac’ to get their attention.
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Hey there! I’m so sorry you felt poorly! I think there are too many places that state “gluten free” when they really shouldn’t. That’s why I state at the the start of this post that if you’re in doubt to ask your batista. Even still it’s not on I will try and get some input from cist themselves on this. Thank you for bring it to my attention. Feel better soon *gentle hugs*
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