The invention provides a custard cake and a making method thereof. Compared with the prior art, salted duck egg yolk is adopted as custard stuffing; in cooperation with hydroxy propyl distarch phosphate and parched flour, the custard stuffing is aromatic, soft and delicious, and the custard cake can keep the aromatic and soft taste without hardening after being placed for a long time; added preserved fruit syrup, sweetened condensed milk, whole milk powder and milk flavor guarantee the milky aroma of the custard stuffing, and in cooperation with the aromatic and soft taste, the dual milky aroma in taste and smell is brought to eaters. The crust comprises almond powder, baking powder, baking soda and low-gluten flour which are used in cooperation, and thus the product is crisp and deliciousand does not harden; in cooperation with the aromatic and soft custard stuffing, the product is rich in mouthfeel. The added milk flavor has high temperature resistance, and thus it is guranateed that the product still keeps a good taste after being treated at a high temperature.