Berry Crisp Dump Cake

Ingredients

• Nonstick cooking spray or butter, for greasing the baking dish
• Two 12-ounce bags frozen mixed berries 
• 1 box yellow cake mix 
• 1/3 cup finely chopped walnuts  
• 1/3 cup rolled oats 
• 1 stick (8 tablespoons) unsalted butter, melted
• Ice cream or whipped cream, for serving

Directions

Preheat the oven to 350 degrees F. Grease a 9-by-13-inch baking dish with cooking spray or butter.

Put the berries in the prepared baking dish. Evenly distribute the cake mix over the berries. Sprinkle with the walnuts and oats. Evenly drizzle the butter over the entire dish.

Bake until firm and golden brown, about 55 minutes. Let sit 5 minutes. Serve with ice cream or whipped cream.