Abstract: The present invention relates to a food grade powder comprising a dried hydrogel co-gel comprising a first biopolymer capable of forming a thermoreversible elastic gel upon cooling to 25° C. or above and a second biopolymer capable of forming a glassy matrix upon drying. The food grade powder may provide controlled release of aroma, the aroma being encapsulated in the hydrogel co-gel. Further aspects of the invention are a food product comprising the food grade powder, a method of making a food grade powder providing controlled release of an aroma and the use of a hydrogel co-gel to control the release of an aroma.