Preheat oven to 350 degree (F). Grease/Non-stick spray loaf pan and set aside.
In a medium bowl, combine the (four) flours, sugar, salt, & baking powder. In a separate bowl, whisk together the melted butter, eggs, and continuing to whisk, add in the milk until everything is well combined. Slowly add the dry ingredients and carefully mix to combine. Fold in the rosemary and lemon zest.
Pour the batter into the prepared loaf pan. Bake for about about 50 minutes. Test with a toothpick – if it comes out clean, it’s done. Enjoy!