Place the butter and cream cheese in your chosen microwavable mug. Microwave on HIGH for 20 seconds.
Add the remaining ingredients and mix well. Be sure to scrape the sides and bottom of the mug to ensure the mug cake batter is mixed well.
Microwave on HIGH for 1:20 seconds minutes.
Please adjust the microwave cooking times according to the strength of your microwave.My microwave is pretty powerful and only requires 1 minute, but most standard microwaves may require the 1:20 as stated in the recipe.No microwave? No problem. Simply bake at 180C/350F in a cupcake case or muffin tray for 12 minutes.