⭐ Plain Kefir (Best Gluten-Free Option)
1 cup kefir per 1 cup buttermilkKefir is a fermented milk product rich in lactic acid and probiotics, closely resembling buttermilk’s acidity and enzymatic activity. This acidity helps tenderize meat proteins and retains moisture.
Use plain, unsweetened kefir to avoid altering the burger’s flavor. Since kefir is slightly thinner than buttermilk, it integrates well without making the mixture too dense.
The final burger will have a subtle tang and moist texture, very close to those made with traditional buttermilk.