If there is something urgent, You should use 1 in place of another for some recipes, but do not count on the exact same taste. You can make your own private gochujang from gochugaru but it is going to get time and effort. Toast some spices and dried chiles about https://beijingredpepper67920.mdkblog.com/36762978/the-smart-trick-of-red-chili-pepper-crushed-mixed-with-seeds-that-no-one-is-discussing