Spiced Oatmeal Raisin Cookies

• 2 cups all-purpose flour
• 1 teaspoon baking soda
• 1 teaspoon baking powder
• 1 teaspoon kosher salt (5 grams)
• 1/2 teaspoon cinnamon
• 1/4 teaspoon nutmeg
• 1/4 teaspoon allspice
• Optional: 1/4 teaspoon cardamom
• 1 cup unsalted butter, softened
• 1 cup sugar
• 1 cup dark brown sugar (or, 1 cup light brown sugar + 1 tablespoon molasses)
• 2 eggs, room temperature
• 2 teaspoons vanilla
• 3 cups old-fashioned rolled oats
• 1 1⁄2 cups raisins

Vanilla Icing

• 1 1/2 cups powdered sugar
• 5 teaspoons milk
• 1/4 teaspoon vanilla
• 1 teaspoon butter, melted