Pour milk into large bowl. Add pumpkin, pudding mixes and pumpkin pie spice. Beat with wire whisk 1 minute until well mixed. (Mixture will be thick.) Immediately stir in whipped topping. Spoon into 8 dessert glasses.

Refrigerate 4 hours or until set.

Mix butter, pecans and sugar in small bowl. Just before serving, sprinkle with pecan mixture. Garnish with additional whipped topping, ground cinnamon, fresh mint and currants. Store leftover mousse in refrigerator.