This Blueberry Dump Cake is a simple, delicious dessert perfect for any occasion. Juicy blueberries are mixed with sugar and lemon juice, topped with a layer of yellow cake mix, drizzled with melted butter, and baked to golden, bubbly perfection. Optional nuts and cinnamon add a delightful crunch and warmth. Serve warm with ice cream or whipped cream for a comforting treat.