In a large mug, mix together hot cocoa mix, flour, sugar, cocoa powder, baking powder, and chocolate chips until combined.
⅓ cup all-purpose flour, 1 tbsp granulated sugar, 2 tbsp hot cocoa mix, ½ tsp baking powder, 1 tbsp semisweet chocolate chips
In another mug, mix together milk and melted butter.
¼ cup milk, 1 tbsp unsalted butter, melted
Now, add the wet ingredients to the dry ones and mix until they are combined. Make sure there are no lumps in the batter.
Put the mug in the microwave for 1 minute and 40 seconds, or until the batter is no longer runny ( If it's not done, cook for 30-second more).
Remove the mug from the microwave and allow it to cool for two minutes.
Then, top with any toppings you like; I used whipped cream and drizzled some chocolate sauce on top.
whipped cream, chocolate sauce
Notes
Check to see whether it's done by gently pressing a couple of fingers against the top: if they stick slightly, it's done. And if it's still completely wet, microwave it in 5- to 10-second increments until it gets the right, slightly sticky consistency.