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We're using lemon pie filling, fresh blueberries, and cake mix to create the ultimate summer dessert. You can have this lemon blueberry dump cake recipe in the oven with just 10 minutes of prep.
Prep Pan Preheat oven to 350°F. Coat a 3-qt. rectangular baking dish with nonstick spray.
Add Fruit Filling Spread lemon pie filling in the bottom of the prepared baking dish. Top with blueberries.
Sprinkle on Cake Mix Sprinkle the cake mix over the lemon-blueberry mixture. Top with poppy seeds (if using). Place butter slices evenly over the cake mix.
Bake and Serve Bake 35 to 40 minutes or until browned. Let cool 15 minutes before serving. Top servings with additional blueberries, whipped cream or ice cream.