In a mixing bowl, add your dry ingredients and mix well. Add the remaining ingredients, except for the chocolate chips, and mix until a thick batter remains. Fold through the chocolate chips.
Grease a microwave safe bowl or mug. Transfer the batter into it and microwave for 60-90 seconds.
Remove the mug cake from the microwave and let sit for a minute, before enjoying.
Oven and air fryer options included in the post.TO STORE: Cover the mug cake and store it in the refrigerator for up to 3 days. TO FREEZE: Remove the mug cake from the bowl and cover it in parchment paper, before placing it in a ziplock bag. Store it in the freezer for up to 2 months. REHEATING: Microwave the mug cake for 20 seconds, until warm.