Apple Butter Spice Cake

Preheat oven to 350°F.

Coat an 8-inch square cake pan with nonstick cooking spray.

Melt butter in a small saucepan over medium heat; swirl the pan until the butter turns a nutty brown, about 1 minute. Pour into a large bowl. Add apple butter, brown sugar (breaking up any lumps) and oil and whisk until smooth. Add raisins, buttermilk, egg and vanilla; mix well. Add flour, baking soda, cinnamon, ginger, allspice and salt; whisk until just combined.

Transfer the batter to the prepared baking dish and bake until a knife inserted in the center comes out clean, 35 to 40 minutes. Let cool for 10 minutes before serving.