Birthday Custard Pie?!

Gluten free baking is quite an exciting animal in its own right, but then throw in a recipe transcription error and it really gets interesting!  I made this cake the other day, I halved the recipe and substituted my own flour blend (1/2 cup each tapioca and corn starch, 1/4 cup millet) and it made wonderful cupcakes!  Then my little son decided he wanted a yellow cake for his birthday, and I thought I had my recipe.  I ended up with a gluten free impossible custard pie!  It actually was quite tasty but it wasn't a birthday cake.  I had transcribed the recipe wrong, leaving the sugar at 2 cups but halving everything else, oops!  I tried again and it was delicious and now we have a memory to laugh at for every birthday here on out!