Raspberry-Rhubarb Slab Pie Recipe
- 3-1/4 cups all-purpose flour
- 1 teaspoon salt
- 1 cup butter
- 3/4 cup plus 1 to 2 tablespoons 2% milk
- 1 egg yolk
- 2 cups sugar
- 1/3 cup cornstarch
- 5 cups fresh or frozen unsweetened raspberries, thawed and drained
- 3 cups sliced fresh or frozen rhubarb, thawed and drained
- VANILLA ICING:
- 1-1/4 cups confectioners' sugar
- 1/2 teaspoon vanilla extract
- 5 to 6 teaspoons 2% milk
- 1. In a large bowl, combine flour and salt; cut in butter until crumbly. Whisk 3/4 cup milk and egg yolk; gradually add to flour mixture, tossing with a fork until dough forms a ball. Add additional milk, 1 tablespoon at a time, if necessary.
- 2. Divide dough in two portions so that one is slightly larger than the other; wrap each in plastic wrap. Refrigerate 1 hour or until easy to handle.
- 3. Preheat oven to 375°. Roll out larger portion of dough between two large sheets of lightly floured waxed paper into an 18x13-in. rectangle. Transfer to an ungreased 15x10x1-in. baking pan. Press onto the bottom and up sides of pan; trim pastry to edges of pan.
- 4. In a large bowl, combine sugar and cornstarch. Add raspberries and rhubarb; toss to coat. Spoon into pastry.
- 5. Roll out remaining dough; place over filling. Fold bottom pastry over edge of top pastry; seal with a fork. Prick top with a fork.
- 6. Bake 45-55 minutes or until golden brown. Cool completely on a wire rack.
- 7. For icing, combine confectioners' sugar, vanilla and enough milk to achieve a drizzling consistency; drizzle over pie. Cut pie into squares. Yield: 2 dozen.
Test Kitchen Tips
1 piece: 247 calories, 8g fat (5g saturated fat), 29mg cholesterol, 159mg sodium, 42g carbohydrate (25g sugars, 2g fiber), 3g protein.
Reviews for Raspberry-Rhubarb Slab Pie
"Very good. I took it to a picnic and didn't get to bring any home. Definitely will make again.."
"I made this with equal amounts of rhubarb and raspberries and a bit less sugar. My family and friends loved it!"
"This was a great way to use the frozen raspberries and rhubarb that I had in the freezer. I am not the greatest pastry chef, so rolling out dough is not an easy job for me. But, I managed. I went one step further and used the food processor for the rhubarb to give it a more even consistency.But, I am confused as to why the oven temperature needs to be 375. In this day and age of well-insulated ovens and pans that are non-stick, I never need to use 375 and I put my oven at 350 for the allotted time and it was still slightly over-baked.Take it easy on the heat.Yummy."
"Our family loves both raspberries and rhubarb-the combination is outstanding. I do 1 1/2 times the recipe as I use a LG jelly roll pan. Outstanding dessert"
"Great dessert for a crowd. I have also made it with strawberries as well. I also reduced berries by a cup and added a cup to the rhubarb. I will definitely make this again."
"I'm rhubarb rich and not willing to spend that many of my hard earned raspberries, so I use 5 c. rhubarb with 3 c. frozen strawberries. With all that cornstarch I have no problem with thickening. I will work on sealing the edges better next time. I had a mess all over the bottom of the oven. I don't remember having that problem the last time I made it. The crust is very forgiving (due to the addition of the egg yolk?). You can make it do what you want it to do without tearing, Anyway, it was a great success at the potluck. I'm glad I took a piece before I ate the rest of the meal because it was gone by the time I got back to the dessert table!"
"The taste was wonderful, but it was difficult to seal the edges together and the juices ran out of the crust. Next time I will just make a pie."
"I've made this several times subbing strawberries for raspberries and every time it's been a huge hit!"
"I'd never made a slab pie before and this one turned out great. The combination of raspberries and rhubarb was delicious, and baking it in a jelly roll pan made slicing and serving simple. I am going to bake my next apple pie in this manner! Great dessert! Thank you, Jeanne Ambrose, for sharing your grandfather's tasty recipe!"
"I would like to try this but with different fruit...any suggestions?"
"Followed recipe as written and it turned out great!"
"This was delicious. I only had about 3 cups of raspberries, so I did 5 cups of rhubarb and the combination was perfect. The icing on top was a really nice touch."
"I really liked this after it had been refrigerated. My husband was impressed. The downside for me was handling the dough. I actually had to put it in the freezer then I could get it to roll better. Probably will make again."
"I didn't have raspberries so substituted thawed frozen strawberries, big mistake. They were too juicy for this recipe and the crust stayed soggy. But the flavor was outstanding! Next time I'll follow the recipe using raspberries."
"I made this recipe just as it was shown, it was excellent! I think next time I will use less sugar, I thought with rhubarb I would need all the sugar, but I didn't. The crust was a bear, but I hate making pie crust anyway, this was just larger, but it turned out fine."
"Was very good. Not very good at making pie crust so used one you roll out all ready made turned out great. Will for sure make again."
"It was an easy & good recipe. However, ithe quite tart. I'll add 1/2 sugar the next time."
"Enjoyed this recipe very much! I used mixed frozen berries with fresh rhubarb, half the sugar and it turned out delicious!"
"Very tasty! Great for a potluck or bbq"
"I found the best way to roll out pie crust and keep it tender and flakyis to wipe the counter top with a damp dish cloth then lay a large piece of plastic wrap over that put your pastry dough in the middle cover with another piece of plastic wrap and roll out. take the top layer off and turn the dough over the pan then peel the plastic wrap off. Comes out perfect every time. If you need to you can always patch the crust. Like another person said the less you handle it the better and don't use too much extra flour"
"This was fabulous! Everyone loved it, and it was definitely put on the "please make it again" list! Very easy to put together."
"jewels2468 as with all pastry crust, the least you handle it the better. Over mixing makes the crust tuff. Plus it sounds like you needed a little more flour on you paper. Practice, and you will be a champ. Good luck"
"This dessert is OUTSTANDING! It was one of the best desserts I've ever made!"
"Every one in my family LOVED these! They all went back for seconds!!"
"Help! I couldn't roll this dough out. I tried the method in the recipie and it stuck to the paper and once I pried it from that I just laid it on a lightly floured counter top and after baking it came out real hard. Not flakey and soft. I do like the flavor of the fruit filling. I used strawberries. I love the flavor of strawberry and rhubarb. I would love to try this again, although it took me a lot more time than the recipe calls for. I have never made a pie before so I would like to see if I can do it right. Suggestions would be appreciated."
"This was absolutely fantastic and the crust super easy! I substituted strawberries for the raspberries. Took to a fellowship and got rave reviews!"
"I can't even roll out dough for a pie let alone an 18 x 13" piece !"
"Have made this a few times and it is a hit every time. The best part is that it feeds a crowd!!"
"I LOVEEEE this recipe!!!!!!!!!!!!"
"Very good and simple to make. Has lots of flaky layers."
"I got rave reviews from neighbors and friends at work they loved it!!"
"I am a subscriber. I hauled this recipe with me back to a family reunion to make. Now that I am home, I couldn't find my magazine. Panic. Thanks TOH for having it online! I have also used other fruit with the rhubarb and flipped the ratio of 5 cups rhubarb and 3 of the raspberries with success. Love family recipes. Thanks for sharing yours."
"Loved this bar. I used strawberries instead of raspberries."
"This recipe is so easy and absolutely deslicious. I've taken the bars to a couple of events and everyone wants the recipe. This is a winner!!"
"The bars were quite simple to make and tasted delectable!"
"Delicious! I used 3 cups of raspberries and two cups of strawberries, plus the rhubarb called for. I used a sl heaping !/3 cup of cornstarch.. For the crust I used the 3/4 cup milk, then add only Tbs. at a time of milk until it forms a ball. I rolled it on a floured piece of parchment a little bigger than a jelly-roll pan. You can then roll the parchment including the crust and unroll it into the pan . Do the same with the top crust. Everyone loved it!"
"Made it exactly as written, was easy and delicious. It will become one of my "Signature Desserts""
"I am involved in a potluck twice a month, so this type of recipe is right up my alley! It is easy and quick to make, serves easily, and is great! The first time I served it to company, I didn't think they would ever stop eating it! I have made it in triple berry and loved it. Spectacular crust, too!"
"This is FABULOUS!!!! I used Pillbury pie crusts rolled 2 together for bottom then 2 for the top. Works great!!"
"Fabulous!! I substitued strawberries for the raspberries since I had fresh strawberries in the garden; it worked out wonderfully. I'm definitely going to make it again this summer when the red raspberries are in season! I loved the rich buttery crust and the glazing. Yum, yum, yum!"
"This went over sensationally at Poker club. I shared the recipe with Mom who has made 3 times in the past 3 weeks. It's great!"
"This is Really, Really Good!!!!!"
"WONDERFUL! I used half whole wheat flour and half white flour and it worked out very well. I completely forgot to put the icing on, and no one missed it. You can still taste the tartness of the rhubarb. I was a little short on raspberries so I used strawberries as well. I'm making this again for the third time now - it is a huge hit!"
"Great combination of flavors & pretty too."
"I made this for Easter and it received RAVE reviews! In fact, the reason I am on the TOH site today is to send the recipe to three different people who requested it! :) I would highly recommend these bars! Thanks so much!"
"My co-workers loved this slab pie!"
"Made by following recipe exactly and it is fabulous!"
"I made this today, but used strawberries on place of the rhubarb only because I didnt have any rhubarb. It is amazing and I'll make it again. Next time I want to try the rhubarb for the tang..."