The batter was poured into a dosing machine (Edhard Corp.,
Hackettstown, USA), the quantity of batter dispensed was adjusted
to 45 g. Twelve paper moulds were arranged in three rows of four
muffins on a baking tray and baked for 16 min at 175 C in an
electric oven with top and bottom heat (Fagor Elegance 2H-114B,
Guipúzcua, Spain). The muffins were packed in polypropylene bags
and stored at 20 C for one day. At least two formulations were
prepared in every case.