Creation of Coffee Ground Energy Bars: Upcycling Café Waste into Protein-Rich Products

Overview

This product development study addresses coffee waste management through the creation of protein-rich energy bars incorporating spent coffee grounds from cafés in Amadeo, Cavite, Philippines. The research responds to the environmental challenge posed by discarded coffee waste, which retains valuable nutrients and bioactive compounds despite typical disposal practices. The investigation developed three distinct formulations combining spent coffee grounds at varying concentrations with conventional energy bar ingredients including oats, nuts, honey, and protein powder. The study framework encompassed nutritional analysis, food safety verification, shelf-life determination, and consumer acceptability assessment to establish both the feasibility and commercial viability of this upcycling approach to food waste valorization.

Methods and approach

The study employed an experimental quantitative research design to develop and evaluate three formulations incorporating 10%, 15%, and 20% spent coffee grounds respectively. Comprehensive product testing protocols included proximate analysis to determine nutritional composition, microbiological examination to verify safety parameters, and shelf-life assessment under controlled storage conditions. Sensory evaluation utilized a 9-point hedonic scale administered to 120 trained panelists, measuring appearance, aroma, taste, texture, and aftertaste dimensions. The evaluation framework assessed compliance with Philippine National Standards for food safety and pursued FDA certification. Cost analysis examined commercial viability based on ingredient sourcing, processing requirements, and market positioning at a retail price point of ₱25.00 per 50g bar.

Results

All three formulations demonstrated nutritional adequacy, yielding protein content ranging from 12.45 g to 15.78 g per 100 g serving. Formulation B, containing 15% spent coffee grounds, achieved the highest overall acceptability score with a mean of 7.85 and standard deviation of 0.92, indicating superior sensory balance across all evaluated attributes. Microbiological analyses confirmed compliance with Philippine National Standards for food safety across all formulations. Shelf-life studies established 90-day stability under appropriate storage conditions. The product obtained FDA certification, validating adherence to regulatory food safety requirements. Cost analysis confirmed commercial feasibility at the established price point, supporting potential market entry.

Implications

The research demonstrates a viable pathway for coffee waste valorization through conversion into nutritious food products, addressing both environmental waste management challenges and consumer demand for protein-enriched snack alternatives. The successful development of formulations meeting nutritional standards, safety requirements, and consumer acceptability thresholds establishes technical feasibility for this upcycling approach. Regulatory approval and demonstrated shelf stability support commercial implementation potential. The study contributes to sustainable food innovation frameworks by documenting a scalable model for transforming food industry byproducts into value-added nutritional products. Economic viability at the demonstrated price point suggests potential for broader adoption across café networks and food waste reduction initiatives. The research provides methodological precedent for similar valorization efforts targeting other food industry waste streams while offering health-conscious consumers functional food products with reduced environmental impact.