Preheat oven to 375.
Grease a baking sheet.
Mix together flour, sugar, baking soda, baking powder and salt.
Add 1/2 cup butter, 1 cup buttermilk and egg to dry ingredients and mix until combined.
Flour work surface.
Turn out dough and knead briefly.
Shape dough into a round shape and place on prepared sheet.
Whisk together 1/4 cup melted butter with 1/4 cup buttermilk.
Brush loaf with buttermilk mixture.
Cut an X in the top of the loaf.
Bake 45 minutes or until toothpick inserted into the middle comes out clean.
Brush with buttermilk mixture every 15 minutes or so while baking.