The fortification with GS powders increased the anthocyanin, flavonol and procyanidin contents of the candies, resulting in an increased antioxidant activity, which remained stable during processing. Furthermore, the fibre-enriched candies exhibited good textural properties. In general, the addition of GS promoted the reduction of the processing time, the replacement of a significant amount of fruit puree with a low-cost and high-nutritional winemaking by-product, as well as the delivery of beneficial compounds, thus highlighting the high potentialities associated with the use of GS in the confectionery industry.