Here is a tried and tested brown rice flour recipe I found on net. It works well and tastes good even for those who can have wheat.
Brown Rice Flour Cake (Wheat free)
4oz (1/2 cup) butter or vegetable oil or shortening (not Crisco; instead try Earth Bound)
4oz (1/2 cup) sugar
2 tsp vanilla extract (alcohol-free)
5oz (1 1/4 cup) brown rice flour
1 tsp baking powder
Preheat oven to 350 F (180 C). Grease and flour an 8" cake pan. Cream butter and sugar until light, then beat in eggs and vanilla. Beat in flour adn baking powder until thoroughly combined. Note: Alternate wet and dry ingredients for better combination. Pour into cake pan and bake for 40-45 minutes or until toothpick comes out clean from center.