This study investigated the functional nutrition of red yeast rice to added beurre mani$acute{e}$ in the production of brown sauce. We added X to Y at levels of 0%, 5%, 10%, 15% and 20% and investigated the effects on the viscosity, water content, turbidity, pH, sugar level, reducing sugar, color, and sensory quality characteristics of the resultant brown sauce. The viscosity of Brown sauce was increased with increasing red yeast rice beurre mani$acute{e}$ while water content and turbidity were decreased. pH was between 4.57~4.91. Sugar level and reducing sugar were increased with increasing red yeast rice powder content. L and a were increased with increasing red yeast rice powder content, and b was decreased. In sensory testing, visual appearance and flavor were highest for brown sauce preparations containing 15% and 20% X. Aftertaste and taste scored the highest for additions of 10% and 15%. For general preference, a 15% addition of X resulted in the highest score. Based on the results, it seems that red yeast rice powder, 15% red yeast rice powder added brown sauce has the highest the general preference.