Samples of approximately 5 g of formulation (for initial mois- ture content) and apple leather (for final moisture content) were placed in a Mettler LP 16 Moisture Analyser set at 105 ◦C, until reaching constant weight, according to the AOAC method 984.25 (AOAC, 1998). Moisture contents were expressed in kg water/kg dry matter, as the average ± standard deviation of the six samples corresponding to every formulation and air temperature used.