You know what would go well with your cup of tea today? A mug cake. A cake made in a mug, and a microwave. In 2 minutes.
All of this is office-friendly. All you need is a microwave, a mug, a spoon and some commitment to your cake goals.
We had a go today at work. Made a chocolate mug cake with melted nutella on top. I would say I have a healthy disrespect for recipes, but strangely mixing warmed nutella with boiling water to make a 'sauce' causes a strange chemical reaction in the nutella where everything seperates and disagrees with you and congeals into a peculiar gritty chocolate situation. Which is not unpleasant to be honest but I guess you couldn't sell it.
Here are some lovely recipes made by some people who measure ingredients.
Babble.com Mug Cakes