The invention discloses a kelp-containing sponge biscuit and a manufacturing method thereof. The kelp-containing sponge biscuit comprises following raw materials in parts by weight: 100 parts of high-gluten flour; 10˜18 parts of white sugar; 30˜40 parts of beaten eggs; 0.5˜0.8 part of ammonium bicarbonate; 0.1˜0.3 part of sodium bicarbonate; 5˜15 parts of kelp powder and 12˜15 parts of water. The kelp-containing sponge biscuit further contains 0˜0.3 part of salt and 0˜5 parts of cream. Main steps of the manufacturing method of the kelp-containing sponge biscuit are as follows: weighing the high-gluten flour, the white sugar, the beaten eggs, the ammonium bicarbonate, the sodium bicarbonate, the kelp powder and the fresh water separately in parts by weight; mixing in order, stirring evenly to form a dough; tablet compressing boiling, cooling, draining and baking the dough, and obtaining the kelp-containing sponge biscuit with marine flavor and rich nutrients.
