Blueberry Mystery Cake Recipe -
Blueberry Mystery Cake Recipe
  • READY IN 1 hr

Blueberry Mystery Cake

Recipe by  

"This recipe is a childhood favorite that my grandma passed to my mom and now I am passing to my own kids! It is quick and easy, and great for summer picnics. Plus, the little ones are fascinated when I tell them the boiling water is the 'mystery' behind the cake. Also great with a scoop of vanilla ice cream on top!"

+ Recipe Box + Shopping List + Menu Print

Ingredients Edit and Save

Original recipe makes 8 servings Change Servings
  • PREP

    15 mins
  • COOK

    45 mins

    1 hr


  1. Preheat oven to 375 degrees F (190 degrees C).
  2. Place blueberries in a deep 8-inch pie pan; drizzle lemon juice over blueberries.
  3. Beat 3/4 cup sugar and butter together in a bowl using an electric mixer until creamy. Sift flour, baking powder, and 1/4 teaspoon salt together in a bowl. Mix milk, alternating with flour mixture, into creamed butter mixture until batter is just combined. Pour batter over blueberries.
  4. Combine 1/2 cup sugar, cornstarch, and 1/2 teaspoon salt together in a bowl until thoroughly mixed; sprinkle over batter. Pour boiling water over sugar mixture.
  5. Bake in the preheated oven until a toothpick inserted in the middle of the cake comes out clean, 45 to 50 minutes.
Kitchen-Friendly View


  • Cook's Note:
  • If top begins to brown too much, lower heat for last 15 minutes.

Reviews More Reviews

Jul 24, 2013

We really liked this cake. I would say it is more like a cake-like pie. I guess my pan wasn't deep enough because it overflowed. . .thank goodness I had the pan on top of a cookie sheet.

Jan 10, 2014

Thanks for the reviews! Glad you are enjoying this family favorite! If you are having issues with the pie pan overflowing (mine is really deep), feel free to make in a larger casserole dish. I sometimes make in a casserole just to have a prettier dish to take to a party.


7 Ratings

Aug 11, 2013

this is quite good. i was looking for a recipe to use the last of my blueberry crop and this fit the bill. the only one thing i would change is to add a bit of cornstarch to the berries before putting in the pan. it is a bit soupy when serving. other than that, no complaints. delicious, quick and easy to make. thanks for the post yogurt4k, i will make again!

Jul 27, 2013

This was easy and was a big hit at my spinning group. I wish I read the first review, I didn't protect my oven and it over flowed. Otherwise, I loved it and will make this again.

Feb 05, 2015

I've been in the overflowing blueberry syrup situation before - & having homegrown, very juicy blueberries nearly ensures a mess - soooo to minimize, I used an 8x8 glass dish. It was fine. I added 2T cornstarch to the berries (very juicy ones) & reduced sugar in the cake part to 1/3c. 'Done in 35- 40 minutes. Done = it bubbles five minutes. The cake part reminded me of a sugar cookie. It's crisp on top, but soft on the blueberry side. A bit too much sugar. 'Not the prettiest dish, but you want to eat it, not just look at it.


Rate This Recipe

Glad you liked it! Your friends will, too:


  • Calories
  • 249 kcal
  • 12%
  • Carbohydrates
  • 50.3 g
  • 16%
  • Cholesterol
  • 13 mg
  • 4%
  • Fat
  • 4.9 g
  • 8%
  • Fiber
  • 1.3 g
  • 5%
  • Protein
  • 2.4 g
  • 5%
  • Sodium
  • 302 mg
  • 12%

* Percent Daily Values are based on a 2,000 calorie diet.

See More
Subscribe Today!

In Season

Chicken Breast Recipes
Chicken Breast Recipes

With our 2,700+ chicken breast recipes, you'll never serve the same old chicken again.

Zucchini On The Grill
Zucchini On The Grill

The firm, juicy texture of zucchini make them a perfect side to toss on the grill.

Subscribe Today! Only $7.99
Subscribe Today! Only $7.99

Delicious recipes, party ideas, and cooking tips! Get a year of Allrecipes magazine for $7.99!

Related Videos

Blueberry Sour Cream Coffee Cake

Blueberries, cinnamon-sugar, and pecans—wake up to a bite of the Big Yummy!

Dannon Blueberry Coffee Cake

Satisfy your sweet tooth with this nutritious idea.

Blueberry Coffee Cake I

This dense, moist cake is easy to assemble and perfect with coffee.

Recently Viewed Recipes

Argentina  |  Australia & New Zealand  |  Brazil  |  Canada  |  China  |  France  |  Germany  |  India  |  Italy  |  Japan  |  Korea  |  Mexico

Netherlands  |  Poland  |  Quebec  |  Russia  |  SE Asia  |  United Kingdom & Ireland  |  United States