Preheat oven to 325 degrees. Grease a 9X5 inch loaf pan.
Combine flour, baking soda, baking powder, sugar, and salt. Blend egg and buttermilk together and add all at once to flour mixture. Mix just until moistened. Stir in butter. Pour into the prepared pan.
Bake for 60 minutes or until a toothpick inserted comes out clean. Cool on a wire rack.
Recipe by SoFabFood at https://sofabfood.com/cinnamon-irish-soda-bread/