What Wasabi Made Of. The tube of paste or package of powder you can buy usually gets its heat from horseradish and its color from food dye. What is wasabi made of?

1 kimchi (salted and fermented vegetables). A substitute for authentic wasabi is often made by combining mustard, horseradish, and food coloring. Its signature clean spiciness comes from allyl isothiocyanate instead of pepper’s capsaicin.