The ice cream mix was collected in three 35-l stainless steel milk containers and refrigerated overnight at temperatures between 2 and 4°C. Prior to continuous freezing, all ice cream mixes were flavoured with vanilla (David Michael & Co., Philadelphia, PA, USA) at 1.5 ml/kg mix. All ice cream mixes were frozen to a target overrun of 100% using a Star Vogt Instant continuous ice cream freezer at a constant rotor speed and back pressure. Air was incorporated into the mixes by the vacuum generated from the continuous freezer mix pump. Semi-frozen ice cream was packaged into 2-l paperboard boxes. Ice cream was hardened and stored at temperatures of −28 to −32°C. Semi-frozen ice cream to be used for sensory panels was filled into 175 g plastic containers at approximately two-thirds of the way through the continuous freezing process. The final composition of the four samples is given in Table 2. Prior to sensory testing, samples were held in storage for a minimum of 4 months.