How to prevent baking a lumpy cake<br>Place oven rack so cake pan will be baking near the center of your oven so the hot air can circulate fully. Make sure rack is level. Preheat oven.
The cake pan must be level
The rack has to be level.  The cake pan has to go on the race.  Therefore it must be level
( z1 obligate :ARG2 ( z2 level :ARG1 ( z3 pan :mod ( z4 cake ) ) ) )