Nutritional Fortification and Sensory Profiling of Cookies Supplemented with Pearl Millet (Pennisetum glaucum) Flour Awaiting Galley Proofs; In Production

Abstract

Background: Given the escalating prevalence of malnutrition and diet-related non-communicable diseases, there is an urgent imperative for the development of nutritious, cost-effective, and sustainable food products. The integration of underutilized, climate-resilient cereals—such as pearl millet—into staple bakery formulations represents a strategic intervention to mitigate these public health challenges. 

Objectives: This study aimed to evaluate the impact of substituting wheat flour with varying proportions of pearl millet flour (PMF) on the proximate composition and organoleptic attributes of cookies.

Methods: Pearl millet flour was substituted for wheat flour at levels of 0% (control), 20%, 40%, 60%, 80%, and 100%. Nutritional profiles were determined according to AOAC standardized protocols, while sensory attributes were assessed using a 9-point hedonic scale. Statistical significance was evaluated via Analysis of Variance (ANOVA) followed by post-hoc mean separation (p < 0.05). Additionally, Principal Component Analysis (PCA) was employed to elucidate multivariate nutritional patterns across the treatments.

Results: The incorporation of PMF significantly elevated protein, ash, dietary fiber, and mineral content across the treatment groups (p < 0.05). Formulations with 40% PMF substitution exhibited superior nutritional density compared to the control (0% PMF), while maintaining parity in overall sensory acceptability. Sensory profiling indicated that 20–40% PMF formulations were organoleptically acceptable compared to the control; however, replacement levels ≥ 60% resulted in a significant decline in appearance and textural scores. Multivariate analysis demonstrated a distinct shift toward nutrient-dense formulations with increasing PMF levels, confirming coordinated enhancements in protein and mineral matrices.

Conclusion: The partial substitution of wheat flour with 20–40% pearl millet flour provides a viable approach for the development of nutritionally fortified cookies without compromising sensory quality. These findings endorse the incorporation of PMF in functional food systems, school nutrition initiatives, and targeted dietary interventions aimed at enhancing nutritional security and promoting sustainable food production.

Keywords: Pearl Millet Floor; Nutritional Enhancement; Proximate Composition; Sensory Evaluation; Principal Component Analysis (PCA).