These bars are always a big hit and are a great way to use those fresh summer berries--though frozen blueberries work just as well. They're especially great with a scoop of vanilla bean ice cream on top.

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Ingredients

24
Original recipe yields 24 servings
The ingredient list now reflects the servings specified
Ingredient Checklist

Directions

Instructions Checklist
  • Preheat oven to 375 degrees F (190 degrees C). Grease a 9x13-inch baking dish.

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  • Combine flour, oats, 1 cup sugar, cinnamon, and baking soda in a large bowl. Cut butter into flour mixture until it resembles coarse crumbs. Reserve about 2 cups flour-butter mixture. Press remaining mixture into the prepared baking dish to form a crust.

  • Bring blueberries, remaining 1/2 cup sugar, cornstarch, and lemon juice to a boil in a saucepan, stirring constantly, until mixture is thickened, about 2 minutes. Spread blueberry mixture over crust and sprinkle with reserved oat mixture.

  • Bake in the preheated oven until topping is just browned, about 25 minutes. Cool before cutting and serving.

Nutrition Facts

156.7 calories; 1.6 g protein; 24.4 g carbohydrates; 15.3 mg cholesterol; 67.7 mg sodium. Full Nutrition

Reviews (79)

Read More Reviews

Most helpful positive review

Rating: 4 stars
07/07/2015
“WE’VE GOT A WIIIIIIINNER!!” So said the voice bellowing from the family room into the kitchen, where I was cleaning up after supper. Truth be told, I was surprised; I was not expecting that great a review of these bars from Hubs at all. They looked a little dry to me. In fact, I thought maybe I had over baked them. Earlier, as I was putting these bars together, I was a little disappointed; the blueberry filling looked skimpy to me. Throwing caution to the wind, I tossed in another handful of berries, filling up the “blank” spaces, so I knew I had to be sure to bake them long enough. I hoped for the best. Well, it obviously was okay. But I still had to see for myself. Hubs, neat freak that he is, used a fork. I did not, and the bar held together nicely. Also, I’m glad I threw in that extra handful of blueberries, but I would have liked a little extra juiciness, so if I make these again, I’ll have to remember to increase all filling ingredients “by a handful.” (For a half recipe in an 8x8" pan) These are fresh tasting, flavorful and buttery and, interestingly, the next day the topping is still as it came out of the oven, not soggy as I had expected. Read More
(21)

Most helpful critical review

Rating: 3 stars
09/03/2013
The crumble "crust" didn't hold together very well and the overall taste is good but not stellar. It was sweet but kind of bland other than that. I think I'd try less sugar and more lemon juice in the blueberry mixture and maybe a little less flour-and-oat mixture next time. Read More
(4)
97 Ratings
  • 5 star values: 66
  • 4 star values: 23
  • 3 star values: 7
  • 2 star values: 1
  • 1 star values: 0
Rating: 4 stars
07/07/2015
“WE’VE GOT A WIIIIIIINNER!!” So said the voice bellowing from the family room into the kitchen, where I was cleaning up after supper. Truth be told, I was surprised; I was not expecting that great a review of these bars from Hubs at all. They looked a little dry to me. In fact, I thought maybe I had over baked them. Earlier, as I was putting these bars together, I was a little disappointed; the blueberry filling looked skimpy to me. Throwing caution to the wind, I tossed in another handful of berries, filling up the “blank” spaces, so I knew I had to be sure to bake them long enough. I hoped for the best. Well, it obviously was okay. But I still had to see for myself. Hubs, neat freak that he is, used a fork. I did not, and the bar held together nicely. Also, I’m glad I threw in that extra handful of blueberries, but I would have liked a little extra juiciness, so if I make these again, I’ll have to remember to increase all filling ingredients “by a handful.” (For a half recipe in an 8x8" pan) These are fresh tasting, flavorful and buttery and, interestingly, the next day the topping is still as it came out of the oven, not soggy as I had expected. Read More
(21)
Rating: 5 stars
07/20/2014
I made these bars with raspberry jam instead of the blueberry mixture and omitted the cinnamon. They were so easy to make and tasted great. I did end up baking them longer than the recipe stated in order to get them browned on top, and I had no trouble with getting the crust to stay together. This is a keeper- I Read More
(15)
Rating: 5 stars
08/12/2014
This is the first dessert I have ever made. It was easy fun and delicious. I can easily see myself making this in the future. The lemon juice really gave a kick to it. I added some frozen yogurt and it was superb. I used fresh blueberries from our blueberry bushes. We ate almost all of it. I added a more blueberries than the recipe said so there would be more of a blueberry taste rather than an oat taste. Read More
(10)
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Rating: 5 stars
08/28/2013
Easy and very delicious! I will be making these quite often.. Read More
(5)
Rating: 3 stars
09/03/2013
The crumble "crust" didn't hold together very well and the overall taste is good but not stellar. It was sweet but kind of bland other than that. I think I'd try less sugar and more lemon juice in the blueberry mixture and maybe a little less flour-and-oat mixture next time. Read More
(4)
Rating: 4 stars
06/29/2014
This was pretty easy to make and tasted great! I ended up mixing the dry ingredients with melted butter instead of chunks of buter in to a moist consistency and spread it on the bottom of the pan and over the blueberries. It turned out fine:) Read More
(3)
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Rating: 5 stars
07/29/2014
I made these yesterday and my family loved them! They were absolutely delicious! I added some whipped topping when I served them and they were even better! I have added this to my recipe book that I have been creating for years to hand down to my daughter when she grows up. Thank you for sharing this fabulous recipe! Read More
(3)
Rating: 3 stars
07/14/2014
It was very sweet and didn't hold together as I expected. I did enjoy the filling but the crumble was not as appealing. Read More
(2)
Rating: 5 stars
06/27/2015
Absolutely delicious just as written! We don't even bother trying to cut these into squares. We just scoop it out into a bowl and add some fresh whipped cream (or vanilla ice cream) and we are good to go! Read More
(1)