Black garlic sauce and preparation method thereof

The present invention discloses a black garlic sauce which is simple in manufacturing and high in nutrition components, and a preparation method thereof. The black garlic sauce consists of the following raw materials in parts by mass: 40-80 parts of black garlic, 20-40 parts of water, 1-5 parts of white sugar, and 1-10 parts of accessory materials. The preparation method is as follows: step one, garlic is put into a sealed fermentation vessel; step two: the black garlic is obtained by variable-temperature fermentation of the garlic; step three: the black garlic is ground into a paste and according to the proportion water, white sugar and accessory ingredients are added to be mixed to obtain a black garlic pulp; step four: the black garlic pulp is concentrated under reduced pressure at a condition of 55-65 DEG C and -0.065 MPa to -0.09 MPa to a water content of 18%-25%, the concentrated black garlic pulp is subjected to a filling operation, and the filled black garlic pulp is then sterilized to obtain the black garlic sauce. The black garlic sauce is strong in oxidation resistance, good in taste, and good in condition.