Sift dry ingredients together in a large bowl. In another bowl, whisk eggs, buttermilk and butter that has been melted and browned slightly. Make a well in dry ingredients and pour in liquid ingredients, mixing quickly. Fold in blueberries. Spoon batter into greased muffin cups and bake until golden brown. Bake at 200ºC or 20-30 minutes.
Makes 24 muffins.