Sweet Potato Cookie Recipe

Name: Sweet Potato Cookie Recipe
Cuisine: African
Ingredients: 1 medium sweet potato (baked and peeled); 1 tablespoon Brown Sugar; 1/4 teaspoon lemon extract; 1/4 teaspoon Ground Cinnamon; 1/8 teaspoon Nutmeg; 1 cup Butter ((2 sticks)); 1 cup Brown Sugar; 1/3 cup Granulated Sugar; 2 large Eggs; 1 teaspoon Vanilla Extract; 1/8 teaspoon lemon extract; 2 1/2 cups Flour; 1 teaspoon Baking Soda; 3-4 cups confectioners’ (powdered) sugar; 1/2 tablespoon Butter (softened); ground pistachios (optional)