High Protein Pumpkin Mug Cake - Ready in Under a Minute

0 In a mug, mix the protein powder, flour, pumpkin pie spice, and baking powder.
1 Add the pumpkin puree and egg white and mix until just combined.
2 Taste the mixture and add a pinch of stevia sweetener if needed.
3 Fold in most of the chocolate pieces, saving some to sprinkle on top.
4 Microwave on high for 45 seconds, until the top is cooked but looks slightly wet in the center.