Heat the oven to 175C/350F degrees. In a medium bowl, sift together the flour and baking powder. Set aside.
In a separate bowl, beat the butter and sugar until light and fluffy. Using a standing or hand mixer, this should take 3 to 5 minutes. One at a a time, making sure they are each incorporated before you add the next, add the eggs to the mixture.
Next, beat in the orange zest, orange extract and orange juice to the butter mixture. The mixture might a look a little odd once you add the orange juice, but it will all come together once you mix in the dry ingredients
Fold the flour mixture into the butter mixture and combine until the cake batter is even and without streaks.
Pour the batter into a greased and floured bundt pan, then bake for 45 to 55 minutes, or until a toothpick inserted in the center comes out clean. Allow the cake to cool into the pan for 45-60 minutes on a cooling rack, then remove from the mold.