Orange Ginger Pudding

Process beans and milk together in a blender until smooth; pour into a small saucepan.

Stir sugar, egg, orange zest, ginger, and cornstarch into the bean mixture until smooth; place over medium heat and cook, stirring constantly, until thickened, about 30 minutes.

Stir butter and vanilla extract into the thickened mixture until the butter is melted; pour into 4 dessert cups and refrigerate until chilled, at least 15 minutes.