It's an americanized version of a polynesian treat. :-) - From Donette Tew

Butter Mochi

1/2 cup margarine (melted)
1 box Mochiko (rice flour?)
2 1/2 cups granulated sugar
1 tsp baking powder
3 cups milk
5 eggs beaten
1 tsp vanilla
1 cup coconut

Preheat oven to 350 degrees. Combine ingredients and 
put in 9 X 13 X 2 pan. Bake until done. about 30 minutes.