In a microwave-safe mug, combine the pumpkin puree, almond flour, protein powder, almond milk, baking powder, pumpkin pie spice, cinnamon, vanilla extract, and sea salt. Stir until everything is well combined.
Gently fold in the sugar-free chocolate chips.
Microwave the mug cake for 1-2 minutes. Start with 1 minute and check to see if it’s fully cooked. If it needs more time, microwave in 10-second intervals until the cake is firm to the touch and a toothpick comes out clean.
Let the mug cake cool for a minute before digging in. You can enjoy it straight from the mug or transfer it to a plate.