Blueberry Lemon Dump Cake

4.94 from 30 votes

Blueberry Lemon Dump Cake

This easy Blueberry Lemon Dump Cake is the best dessert recipe and made with only 5 ingredients! Fresh blueberries with pops of citrus and a rich, buttery topping--all baked up using only one dish. So simple and perfect with a scoop of ice cream!

Prep Time10

Cook Time45

Total Time55

Course: Dessert

Cuisine: American

Servings:

Calories: 294kcal

Author: Lorie Yarro

Ingredients

6 c blueberries
⅔ c sugar
1 T cornstarch
2 T lemon zest, separated
½ c butter (plus 1-2 T more if needed)
1 15.25 oz. cake mix (I used Betty Crocker super moist yellow)

Instructions

Preheat oven to 350°F.
In a greased 9x13 baking pan, toss together sugar, corn starch, blueberries and 1 tablespoon lemon zest. Spread out evenly into the pan.
Pour cake mix over top of the berries to cover completely. Sprinkle the other 1 tablespoon of lemon zest (can always use a bit more if desired!) over top of the cake mix and using a spoon or your fingers try to gently incorporate it into the cake mix.
Slice the butter thin, into about ¼ in thick pieces and spread evenly all over the cake mix. Place in the oven and bake for about 45-55 minutes or until bubbly and to the desired brown color.
Remove and allow to cool. Serve warm with a big scoop of vanilla ice cream. Refrigerate leftovers for up to 5 days.

Notes

You can use the same pan for this entire recipe. Toss the berries, sugar, and lemon zest together in the pan and then layer everything right on top.
When lining up the butter, you want to keep the butter close and spread it so that it will cover the entire pan. I found halfway that a few spots didn't have enough butter spread on them and so I just added more in the middle of baking. Another solve for this: cut your butter slightly thinner and leave less space between the edges. I had no problem adding a touch more here and there.
Dump cakes are fairly thin (in height) but they are rich. Using a 9x13 pan works well but if you want your dump cake to be a bit deeper, use a slightly smaller pan--some casserole dishes that measure in quarts versus length can be another good option. You may just need to extend the time slightly.
Bake this to the color brown that you prefer. If you like your crumble toppings on the lighter side, feel free to pull this out of the oven a bit early. And you can also leave it in a touch longer to get it nice and extra brown--my personal favorite.

Nutrition