Whisk together flour and baking powder in a medium bowl.
Beat butter and sugar together until creamy then add eggs and beat until light and fluffy.
Pour buttermilk, vanilla, orange extract and orange zest into sugar mixture and beat until combined.
Gradually add flour and mix until just combined and then add food coloring. Stir.
Pour into prepared Bundt pan and bake for 50-60 minutes or until tooth pick inserted comes out clean.
Carefully remove from oven and let sit for about 5-6 minutes then turn over on wire rack to cool.