Put butter into a small sauce pan on medium heat and let is bubble until it turns brown. Keep an eye on it so it doesn't burn or turn too dark
Preheat oven to 350 F
In a large bowl of mixer, add ingredients except rice flour and baking powder
Mix until fully combined, add rice flour and baking powder to combine
At this point you can combine by hand with a spatula to evenly incorporate all the flour
lightly grease the muffin tin or liner with butter or an oil spray so the muffins don't stick
Pour muffin batter into tin, makes about 6-7 muffins
Bake muffins for 45 minutes.