Ingredients

• 4.5 cups fresh blackberries
• 1.5 cups white sugar
• 1 cup unsalted butter , thinly sliced
• 1 , 15.25 ounce

Instructions

1. 1 Preheat the oven to 350 degrees F (175 degrees C).
2. 2 Mix blackberries and sugar together in a bowl. Transfer to a 9x13-inch glass baking pan and spread evenly over the bottom.
3. 3 Sprinkle cake mix evenly over the berries. Place butter slices evenly over the cake mix; most of the cake mix should be covered with butter slices. Do not mix or stir.
4. 4 Bake in the preheated oven until topping is golden brown, about 45 minutes. Serve warm.

Nutrition per serving