Preheat your oven to 350°F (175°C). Grease and flour a bundt pan.
In a mixing bowl, cream together the butter and sugar until light and fluffy.
Add the eggs one at a time, beating well after each addition. Stir in the vanilla extract and orange zest.
In another bowl, combine the flour and baking powder. Gradually add to the creamed mixture alternately with the orange juice, beating well after each addition.
Fold in the cranberries.
Pour the batter into the prepared bundt pan. Bake for 50 minutes or until a toothpick inserted into the center comes out clean.
Let the cake cool in the pan for 10 minutes, then turn out onto a wire rack to cool completely.