As an added bonus, you can easily make this keto friendly or vegan. Makes 2 decent sized mug cakes, or 1 if you have a huge mug and are feeling gluttonous!
Whisk into the liquids:
Let the batter sit for 15 to 20 minutes to let the gum do its thing.
Portion the batter into your mug as follows:
Microwave on HIGH for 90 seconds and check. The surface should be just set. If it isn’t, zap for another 15 seconds at a time until it is. (If you’re being gluttonous and put the whole batch into a gigantic mug, you might want to microwave for 2 minutes and check then for done-ness.)
Let your mug cake sit for a minute or two before you tuck in to avoid the “molten chocolate lava” feeling.
If you want to amp up the chocolate flavour try adding a little instant coffee powder. Start with just a little, maybe 1/4 teaspoon, because you might end up in mocha town instead.