Chocolate-Orange Silk Mousse

INGREDIENTS

1 12.3 ounce package

reduced-fat silken tofu (1 1/2 cups)

4 oz

bittersweet chocolate, finely chopped

1/3 cup

unsweetened cocoa powder

1/4 cup

boiling water

1 tsp

vanilla extract

1/2 tsp

freshly grated orange zest, plus more for garnish

2/3 cup

confectioners' sugar

2/3 cup

chocolate wafer crumbs (about 3 ounces)