A delicious, fresh blueberry sauce adds a beautiful color to this white sheet cake. Top each serving with sweetened whipped cream and garnish with fresh blueberries, if desired.

Bibi

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Recipe Summary

prep:
10 mins
cook:
35 mins
additional:
25 mins
total:
1 hr 10 mins
Servings:
12
Yield:
1 9x13-inch cake
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Ingredients

12
Original recipe yields 12 servings
The ingredient list now reflects the servings specified
Ingredient Checklist

Directions

Instructions Checklist
  • Preheat the oven to 350 degrees F (175 degrees C). Grease and lightly flour a 9x13-inch baking pan.

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  • Blend cake mix plus extender, 1 1/4 cups water, egg whites, and oil together in a bowl using an electric mixer until just moistened. Pour batter into the prepared pan.

  • Bake in the preheated oven until a toothpick inserted into the center of the cake comes out clean, 32 to 26 minutes.

  • While cake is baking, stir sugar and cornstarch together in a small saucepan over medium heat. Add 1 cup water and bring to a boil, stirring constantly. Add blueberries and lemon juice; cook and stir until blueberries burst and sauce turns a deep purple color, about 10 minutes. Gently mash any berries that did not burst. Remove from heat and let cool until cake is ready.

  • Transfer cake to a cooling rack and let cool to room temperature, at least 25 minutes.

  • Poke holes into the cake about 1 inch apart using the handle of a wooden spoon. Slowly pour the warm blueberry sauce over cake. Refrigerate until cool before slicing.

Cook's Note:

The directions for making the cake are based on the particular brand mentioned. Follow instructions on the box if using a different brand. Some cake mixes are 16.25 ounces, and some are 15.25, so add the appropriate amount of extender as needed to reach 18.25 ounces.

Nutrition Facts

323 calories; protein 3.3g 7% DV; carbohydrates 54.2g 18% DV; fat 10.8g 17% DV; cholesterol 0mg; sodium 306.2mg 12% DV. Full Nutrition
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Reviews (3)

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Most helpful positive review

Rating: 4 stars
04/22/2020
4.20.20 ... https://www.allrecipes.com/recipe/274312/blueberry-poke-cake/ ... 'Wanted an easy, pretty, low-mess cake & this fit the bill perfectly! 'Made two nine inch layers rather than one 9x13. One to share; one to keep. With that, I doubled the sauce. Homegrown berries are sweet & juicy so I decreased sugar & increased the cornstarch >>> 1c sugar, 1/3c cornstarch, 3c blueberries, 2t lemon juice ... Much of the sauce didn't enter the cake. Big berries, too much cornstarch? I made lots of holes for it! :D 'Still good & plenty sweet with just one cup sugar. Thanks for sharing your recipe, Bibi! :) .... Okay, the cake was cut about five hours ago & now it's half gone. :O :D Read More
3 Ratings
  • 5 star values: 1
  • 4 star values: 2
  • 3 star values: 0
  • 2 star values: 0
  • 1 star values: 0
Rating: 5 stars
02/07/2020
Woo-Hoo! You will love this poke cake. I made it for a pot-luck at work and everyone asked me for the recipe. It was the only dessert that was completely gone and two people were fighting over the last piece! Thanks again, Bibi for another amazing recipe! :-) Read More
Rating: 4 stars
09/06/2020
Blueberry Poke Cake by Bibi. Doubled with these amounts: 1c sugar, 1/3c cornstach, 3c berries, 2t lemon juice. Read More
Rating: 4 stars
04/22/2020
4.20.20 ... https://www.allrecipes.com/recipe/274312/blueberry-poke-cake/ ... 'Wanted an easy, pretty, low-mess cake & this fit the bill perfectly! 'Made two nine inch layers rather than one 9x13. One to share; one to keep. With that, I doubled the sauce. Homegrown berries are sweet & juicy so I decreased sugar & increased the cornstarch >>> 1c sugar, 1/3c cornstarch, 3c blueberries, 2t lemon juice ... Much of the sauce didn't enter the cake. Big berries, too much cornstarch? I made lots of holes for it! :D 'Still good & plenty sweet with just one cup sugar. Thanks for sharing your recipe, Bibi! :) .... Okay, the cake was cut about five hours ago & now it's half gone. :O :D Read More
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