I became pretty familiar with using a microwave to cook (even more so than college) and one of my favorite recipes was a brownie in a cup. http://pinterest.com/pin/195273333819609268/ It doesn't match the real thing, especially the texture, but I love that you can make one serving at a time.
Now that I have moved up to the glamourous life of teaching, I have an oven! I still overuse the microwave. That being said, I found a skinny recipe for a brownie in a cup (110 calories) http://pinterest.com/pin/200691727120727177/ . This is the only one I found without yogurt included. Not that I am against yougurt as a theory, just never have it at home. Here is how it turned out for me:
Step 1 spill flour on counter.
Step 2: Pose spraying generic Pam in mug, include unpedicured feet in shot.
Step 3: Look for a measuring spoon that equals a tablespoon. Question organization skills.
Step 6: Break the microwave by asking it to heat something for thirty seconds. Butter still cold. Microwave has smoke coming out. Told you we use it a lot.
Step 7: Ask husband to get spare microwave (who doesn't have a spare).
Step 8: Leave microwave in inconvenient spot on counter instead of scooting it to the space designated for a microwave.
Step 9: Eat brownie.
The verdict? If regular brownie in a mug has a rubbery texture, this is a tire. Wasn't very good. Sometimes, the calories are worth it.