
Cookies
1 cup unsalted butter, at room temperature
1 cup granulated sugar
½ cup packed dark brown sugar
2 large eggs, at room temperature
1 tsp vanilla extract
1 ¼ cup cake flour
2 Tbsp cornstarch
½ tsp ground cinnamon
½ tsp ground ginger
½ tsp baking soda
¼ tsp salt
¼ tsp ground allspice
2 ¼ cup regular rolled oats (not instant)
1 cup raisins
Filling
¾ cup peanut butter
¼ cup unsalted butter, at room temperature
½ cup icing sugar, sifted