Fermented Soy-coffee Pudding Dessert Containing Probiotics: Product Formulation and Evaluation of Compositional Changes during Fermentation

This study aimed at developing a probiotic fermented soymilk-based dessert containing coffee and soybean hull. Nine fermented formulations were elaborated with 10% powdered soymilk (w/v), varying percentages of sugar, arabica soluble coffee, and soy hull. They were fermented with probiotic strains of Lactobacilli and Bifidobacteria (10 6 CFU/mL). One hundred and twenty-nine adults from Rio de Janeiro/RJ and Curitiba/PR, Brazil, evaluated the acceptance of the formulated products. The final formulation was physicochemically characterized. During 6h fermentation, the probiotics count increased from 10 6 to 10 8 in both strains. The well-accepted formulation contained 15% sucrose, 1% soy hull, and 0.5 or 1.5 % soluble coffee (score: 6.6±1.5 on a 9-point-scale). Alternatively, sucrose can be replaced by other types of sweeteners. Young people (n=45) who drank 2-4 cups of coffee per day liked the product the most (score: 7.1±1.4). While fermentation did not affect the total soy isoflavones content, it decreased the content of coffee chlorogenic acids by 32.6% but produced bioavailable phenolic acids as metabolites. A decrease in the content of flatus-producing oligosaccharides was also observed. In conclusion, probiotics fermentation and the addition of arabica soluble coffee made possible the development of a well-accepted and potentially healthy beany-flavor-free, dairy-free, pudding-like dessert.