Best EVER Oatmeal Raisin Cookie Recipe: Chewy & Spiced!

Ingredients

• 6 ounces (170g) unsalted butter, cut into cubes
• 1/2 cup (75g) raisins (golden or regular)
• 2 tablespoons (30ml) dark rum (or apple juice for alcohol-free)
• 1 1/4 cups (150g) all-purpose flour, spooned and leveled
• 1 teaspoon baking soda
• 1 teaspoon ground cinnamon
• 1/2 teaspoon kosher salt
• 1 cup (200g) packed light brown sugar
• 1/2 cup (100g) granulated sugar
• 1 large egg
• 1 teaspoon pure vanilla extract
• 1 1/2 cups (150g) rolled oats (old-fashioned, not instant)
• 1/2 cup (60g) chopped walnuts or pecans (optional)