Tongguan Thousand Layer Cake should not taste sour.

Tongguan Thousand Layer Cake is a traditional delicacy in Tongguan County, Shaanxi Province. It is famous for its clear layers, crispy texture, sweetness and deliciousness.

Authentic Tongguan Thousand Layer Cake should be mainly sweet and not sour.

If Tongguan Thousand Layer Cake tastes sour, it is due to problems during the production process or deterioration caused by improper storage.

It is recommended that when purchasing and eating Tongguan Thousand Layer Cake, you should choose regular merchants and brands, and pay attention to preservation and consumption methods to ensure the taste and quality.