Preheat your oven to 350°F (175°C). This ensures that your cookies bake evenly and achieve that perfect golden-brown color.
In a large mixing bowl, melt the coconut oil if it’s solid. Once melted, add the brown sugar and maple syrup. Whisk until well combined and smooth. Next, add in the egg and 1/2 teaspoon of vanilla extract, mixing until fully incorporated.
Stir in the grated carrots, ensuring they’re evenly mixed into your wet ingredients. The carrots add moisture and a delightful sweetness to your cookies.
In another bowl, whisk together the unbleached all-purpose flour, whole wheat pastry flour, baking powder, baking soda, salt, cinnamon, and nutmeg. This mixture will give your cookies structure and warmth.
Gradually add the dry ingredient mixture to the wet ingredients, stirring gently. Be careful not to overmix; you want a thick batter. Fold in the rolled oats and the Greek yogurt until everything is just combined.
Using a cookie scoop or tablespoon, drop rounded balls of dough onto a parchment-lined baking sheet, leaving space in between for spreading.
Bake in the preheated oven for 12-15 minutes, or until the edges are lightly golden. The centers may look slightly underbaked, but they will firm up as they cool.
While the cookies cool, mix the powdered sugar with 1/4 teaspoon of vanilla extract and add a splash of milk until you reach your desired icing consistency. Drizzle over cooled cookies for an extra touch of sweetness.