1. Adjust the list of ingredients. You can add more water or milk to the pulp to make it thinner. You can also consider adding some other liquid ingredients such as coconut milk and fruit juice. Also, you can moderately increase the number of horseshoes to increase the thinness of the pulp.
2. Adjust the preparation steps. You can try to reduce the amount of horseshoe powder, or reduce the time of cooking the pulp to reduce the consistency of the pulp. Also, you can be more patient and careful when mixing the pulp to ensure that it is evenly thinned.
It is important to note that the process of remedying the slurry of the horseshoe cake should be careful to maintain the texture and flavor of the slurry, and not to over-adjust the list of ingredients and the preparation steps, so as not to affect the overall quality of the horseshoe cake.