Costack Seafood Stock Powder is the concentrated shellfish umami base for risotto, paella, fish pie, gumbo, and seafood soups. A teaspoon transforms the dish. UK home cooks use it to anchor seafood cooking with the deep, savoury, slightly briny depth that professional kitchens rely on. Contains shellfish (crayfish). UK seasoning brand. Free UK delivery on orders over £35. Concentrated shellfish flavour for risotto, paella, fish pie, and seafood soups. A teaspoon transforms the dish. Costack Seafood Stock Powder delivers the deep, savoury, slightly briny umami that professional kitchens use to anchor seafood cooking. Why this beats stock cubes Real shellfish flavour: the briny umami you actually want. Goes into seafood risotto, paella, fish pie, chowders, gumbo, soups, stews, jollof, hot broth. 1 tbsp per pot of soup or risotto. Pairs with every Costack savoury blend. How to use it Seafood Risotto: 1 tbsp stirred in with the stock as the rice cooks. Restaurant-grade depth. Paella: 1 tsp at the start, with the stock and saffron. Fish Pie filling: half a tbsp into the bechamel for an instant lift. Egusi Soup: 2 tbsp into the simmering soup with leafy greens. Hot Broth boost: 1 tbsp added with Costack Aromatic Hot Broth Spice. Ingredients Salt, flavour enhancers (E635, E621 – MSG), sugar, starch, dried shrimp powder, glucose, maltodextrin, rice, garlic, ginger, disodium succinate, white pepper, paprika extract, shrimp flavour. Allergy advice: contains shellfish (shrimp/crayfish); may contain traces of soya and milk. Full ingredient and allergen information is printed on every label. FAQ Allergens? Contains shellfish (crayfish/shrimp). Not suitable for shellfish allergy. May contain traces of soya and milk. Is it salty? Lightly. Adjust salt elsewhere. Does it taste fishy? No. Briny umami, not fishy. Does it contain MSG? Yes. This stock powder contains flavour enhancers E621 (MSG) and E635 for savoury depth. Both are clearly listed in the ingredients on the label.Ships worldwide to 188 countries including the USA. Duties and taxes shown upfront at checkout.