Tamarind can be hard to come by outside of the Philippines. However, tamarind pulp is readily available in most Asian grocery stores. You can also look for bouillon cubes that have a tamarind base. Bouillon cubes are dehydrated broth in cube form. One bouillon cube mixed with one cup of boiling water will make one cup of broth. For this recipe, you would only need one tamarind bouillon cube.