In a bowl, mix all dry ingredients and set aside.
In a separate bowl, add butter and sugar. Cream the butter and sugar until light and fluffy. Zest & juice 1 orange and add to the bowl. Add in your eggs and beat until fully incorporated. You can use a hand mixer for this step.
Add dry ingredients to wet ingredients. Using a wooden spoon, gently fold the mixture until well incorporated. Pour your mixture into your loaf pan. Grab your second orange and cut it into thin slices.
Bake your cake for 30-40 minutes or until golden brown and the orange slices are perfectly caramelized. To make sure that your cake is baked, poke it with a clean toothpick. If it comes out clean, it's ready.
Let it cool down for 10 minutes before you cut. Serve with a cup of coffee or tea and enjoy.