Preheat the oven to 350 degrees F (175 degrees C). Line 18 standard muffin cups with paper liners.
Sift flour, cinnamon, baking soda, baking powder, allspice, salt, nutmeg, and cloves together in a large mixing bowl.
Mix brown sugar, sour cream, white sugar, vegetable oil, eggs, and vanilla together until smooth. Add wet ingredients to dry ingredients, and stir until just combined. Stir in carrots, then fold in pecans. Divide batter evenly between the prepared muffin cups.
Bake in the preheated oven until a toothpick inserted in the centers comes out clean, 17 to 20 minutes. Cool in the tin for 10 minutes. Transfer to a wire rack and let cool completely, about 20 minutes.
While the cupcakes are cooling, beat cream cheese, butter, vanilla, and lemon juice in a mixing bowl with an electric mixer until smooth. Add confectioners' sugar, a bit a time, until smooth and desired sweetness is achieved. Spread onto cooled cupcakes.
Nutritional Facts
Per 18 servings
Calories: 428
Carbohydrate: 52g
Fat: 23g
Fiber: 2g
Protein: 5g
Sugar: 38g
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