Carrot-Walnut Muffins

Ingredients

• • nonstick cooking spray
• • 1 ¾ cups whole wheat flour
• • 1 ½ teaspoons baking powder
• • 1 teaspoon ground cinnamon
• • ½ teaspoon baking soda
• • ½ teaspoon salt
• • ½ teaspoon ground ginger
• • ¼ teaspoon ground nutmeg
• • 2 cups peeled and grated carrots
• • ¾ cup roughly chopped walnuts
• • ¾ cup raisins
• • 1 ½ tablespoons whole wheat flour, or as needed
• • ½ cup maple syrup
• • ⅓ cup extra-virgin olive oil
• • 2 eggs, at room temperature
• • 1 cup plain Greek yogurt
• • 1 teaspoon vanilla extract
• • 1 tablespoon turbinado sugar, or to taste