Preheat oven to 375°. Whisk together flour, brown sugar, poppy seeds, baking powder, baking soda, and salt in a large bowl. Stir in eggs, olive oil, and orange zest. Fold in shredded carrots and buttermilk. Place paper baking cups in a 12-cup muffin pan. Spoon batter into cups, filling two-thirds full. Bake 20 to 22 minutes or until golden brown.
Beet-Poppy Seed Muffins: Switch up the color and flavor by using shredded beets in place of carrots. Prepare recipe as directed, substituting 1 large fresh beet, peeled and shredded (about 1 1/2 cups), for carrots. Omit buttermilk. (Do not squeeze juice from shredded beet.) Calories 160; Protein 2.7g; Carbs 24.7g; Fiber 1g; Fat 5.9g