Carrot Cake Cookie Sandwiches

Ingredients

• 1 cup packed light-brown sugar
• 1 cup granulated sugar
• 1/2 pound (2 sticks) unsalted butter, room temperature
• 2 large eggs, room temperature
• 1 tsp. pure vanilla extract
• 1-1/2 cups all-purpose flour, plus more for flattening cookies
• 1 tsp. baking soda
• 1 tsp. baking powder
• 1/4 tsp. salt
• 1 tsp. cinnamon, ground
• 1/2 tsp. nutmeg, ground
• 1/2 tsp. ginger, ground
• 2 cups old-fashioned rolled oats
• 1-1/2 cups carrots, finely grated (about 3 large carrots)
• 1 cup raisins