Pre-heat the oven at 400F.
In a bowl mix together all the ingredients very well. Use a hand mixer to make sure that all the lumps are dissolved.
Coat the bottom and sides of a 9" springform pan with butter.
Pour the mix in the springform pan.
Bake the cake at 400F for 60 minutes. Test with a toothpick... if it comes out dry... you are done!
Let it cool and serve.