Had to try this with cake mix.

Used 1/2 cup mix
1 egg
2 Tbs. oil
1/3 cup milk

Stirred & poured into 2 mugs. Cooked 1 mug for 2-1/2 mins. Was a bit tough on bottom, but I probably cooked it too long.

NOTE: I baked one for 2 mins and then took it out of the mug & placed it upside down on a paper plate and baked it another 20 seconds. Perfect!