The invention relates to the technical field of coffee beverage preparation, and particularly discloses a formula and a preparation method of effervescent coffee, and the formula of the effervescent coffee comprises the following raw materials: composite microcapsule coffee
powder, an acid source, an alkali source, a
flavor regulator, a filler and a
lubricant; the preparation method of the effervescent coffee comprises the following steps: mixing the composite microcapsule coffee
powder with the
flavor regulator, adding the acid source, and uniformly mixing to obtain a premix 1; uniformly mixing the alkali source and the filler to obtain a premix 2, adding the premix 2 into the premix 1, adding the
lubricant, uniformly mixing, and tabletting to obtain the effervescent coffee. The prepared effervescent coffee has remarkable advantages in mouth feel,
flavor and functionality, is mellow and fine in mouth feel, rich and unique in flavor, excellent in stability and not prone to deterioration in the storage and transportation process. In addition, the effervescent coffee also has remarkable
antioxidant activity, can effectively scavenge free radicals so as to
delay senescence, and is delicious and healthy at the same time.