• Prepare the oven. Preheat your oven to 350°F and spray a 9x13 lipped baking sheet with nonstick baking spray.
• Combine the dry ingredients. In a large bowl, combine the all-purpose flour, cinnamon, baking soda, ground nutmeg, salt, and allspice and set aside.
• Mix the wet ingredients. In a medium bowl, mix together the applesauce, brown sugar, granulated sugar, butter, eggs, and vanilla extract. It's ok if the butter doesn't completely blend in.
• Add the wet to the dry. Add the wet ingredients to the bowl with the dry ingredients and stir together until smooth, but do not overmix.
• Toss in walnuts for crunch. Add the walnuts to the mixture.
• Transfer to your baking dish. Pour the batter into the baking dish and bake uncovered for 30 minutes or until a toothpick inserted into the center of the cake comes out clean.
• Cool and serve. Cool completely before slicing and serving.

Optional Glaze

• While waiting for your cake to cool, heat 2 tablespoons of butter and 1 tablespoon dark brown sugar in a small microwave-safe bowl for 1 minute. Stir until the brown sugar has dissolved and brush over the cake before slicing.