Answers:
Move the vessel to a lower rack contained by the oven.
And did you set the heat at the right degree?
If it is too hot too soon, the outside will cook quicker than the inside.
Other Answers:
DON'T TRY
not cooking long adequate
or cooking a too elevated of bake
Are you using metal pan? Try using a silicon cupcake tub. It works unbelievably economically and I found that it make the cupcakes of late right.
Source(s):
personal experience
Rack too dignified.
Temperature too glorious - (lower temp 25 degree and cook rather longer).