What can you use to make a more thicker form using liquid and powder mixed together?

To create a thicker mixture from a liquid and powder, you can use ingredients like cornstarch or flour. By mixing cornstarch with a small amount of cold liquid to create a slurry before adding it to the hot liquid, you can achieve a thicker consistency. Alternatively, using flour directly can also work, but it may require cooking for a longer time to eliminate any raw taste. Adjust the amounts based on your desired thickness.