"Steak Dry Aging": An Innovative Approach to Producing High-Yield, High-Quality Dry-Aged Beef

Area of Science:

• Food Science
• Meat Science
• Food Processing Technology

Background:

• Conventional dry-aging (DA) of beef is a premium process but often results in significant weight loss and trimming waste.
• Optimizing aging protocols is crucial for enhancing yield, preserving quality, and improving economic viability in the meat industry.

Purpose of the Study:

• To evaluate a novel steak dry-aging (StDA) protocol combining initial dry-aging with subsequent wet-aging.
• To compare StDA with conventional DA and unaged controls regarding yield, physicochemical properties, and microbiological quality.
• To assess the impact of StDA on sensory attributes and amino acid profiles.

Main Methods:

• Beef steaks underwent StDA until 15% weight loss, followed by wet-aging for 14 or 28 days.
• Comparison with conventional DA (28 days) and unaged controls.
• Analysis included saleable yield, physicochemical composition, water activity, total free amino acids, microbiological quality, and instrumental color and texture analysis.

Main Results:

• StDA significantly increased saleable yield (up to 35% higher than DA) and reduced trimming.
• Physicochemical and microbiological profiles were similar between StDA and DA.
• 28-day StDA exhibited higher glutamic acid content (umami) and lower taurine compared to DA, with slightly lower shear force and more intense red color.

Conclusions:

• The 28-day StDA protocol is a viable and scalable alternative for producing high-quality dry-aged beef with enhanced yield and process efficiency.
• StDA offers a practical, cost-effective method for processors, potentially making premium dry-aged beef more accessible.
• This method balances yield improvements with the preservation of desirable sensory attributes and microbial safety.