Preheat in 375 oven. place butter and water in a saucepan. bring to a boil, remove from heat and wisk in the cocoa powder. let cool. in seperate bowl, sift together splenda, quinoa flour, baking powder, baking soda and salt. add to the cooled cocoa mixture, egg yolks, vanilla and yogurt and blend well. beat egg whites until stiff but not dry. fold into batter. spoon into lined muffin tin. bake 20 minutes or til tested with toothpick comes out clean. makes 12 big ones or 24 small ones.