Place the butter in a medium bowl and melt it in the microwave for 30 seconds.
Add the pumpkin purée, agave nectar, egg, and vanilla to the bowl.
Whisk to combine.
Add the almond flour, pumpkin pie spice, and baking powder to the bowl.
Whisk until combined.
Divide the batter between two mugs. You could put it all in one bigger mug and cook it for a little bit longer, but for smaller portions, divide between two mugs.
One at a time, place a mug into the microwave and cook for 1 minute.
Top each mug with whipped cream or ice cream (or both) and an extra sprinkle of pumpkin pie spice and enjoy!