Can you stack a +2 card on another +2 card?

According to the official UNO rules, stacking a +2 draw card on another +2 is not allowed. The targeted player must draw two cards, and play moves to the next person. However, if you’re using the Accumulation Rule, stacking is permitted, allowing the penalty to grow as additional +2 cards are played. This house rule adds an extra layer of strategy and intensity to the game!