Around 10% of the global fish catch (>90 million tonnes) is currently discarded, while by-products in fisheriesaccount for up to 70% of the whole fish weight. From these, fish bones and scales represent 14–20% of by-products, which are also discarded. Therefore, there is an unmet need for valorising these by-products bytransforming them into functional and nutritious ingredients. Towards this objective, we report herein differentculinary processes to extract gelatine from fish scales, as well as fish flours from bones and scales, as innovativemethods for waste valorisation in the food services industry. On the one hand, gelatine was extracted fromdemineralised and non-demineralised scales and their respective gelling and melting properties were analysedand compared in culinary elaborations. Both gelatines showed a lower melting point (23 ◦C) than pork gelatine(29 ◦C, used as control), which provided these gelatines with a smooth and creamy texture in mouth. On theother hand, financiers made of fish bone and fish scales flour were compared with those made with regularwheat-flour, resulting in no significant differences regarding their adhesiveness and springiness. These resultsshowcase the potential of upcycling fish by-products into protein-rich value-added ingredients in the food servicesindustry..