D-OPTIMAL MIXTURE DESIGN APPROACH IN THE PRODUCTION OF COOKIES ENRICHED WITH DIETARY FIBER SOURCES SUCH AS LENTIL FLOUR, BANANA FRUIT AND BANANA PEEL POWDER

Abstract

This study aimed to develop fiber-enriched cookies by partially replacing wheat flour (WF) with alternative fiber sources including yellow lentil flour (YLF), green lentil flour (GLF), banana powder (BP), and banana peel powder (BPP). The ratios of YLF, GLF, and WF were identified as 24.5, 10.7, and 64.8 % (flour basis), respectively, considering the mixture experimental design for an optimal breaking strength of cookies. Four types of cookies were studied: (i) wheat-based cookies (WC), (ii) lentil flour, BP and BPP-incorporated cookies (LBC), (iii) BP and BPP-incorporated cookies (BC), (iv) lentil flour-incorporated cookie (LC). LC showed a higher spread ratio and lightness than LBC and BC. Although alternative ingredients enhanced dietary fiber content compared to wheat-only cookies, the liking degree of sensory attributes was lower in LBC and BC. Overall, LC was superior to LBC and BC samples, indicating possible use of lentil flours for partial replacement of wheat flour for desired physical, chemical, and sensory attributes.