Buttery Rhubarb Poptart Slabs

Buttery Rhubarb Poptart Slabs are a delightful dessert that combines sweet and tart flavors in a flaky pastry. This recipe is easy to follow and perfect for sharing with friends and family. The combination of rhubarb and a buttery crust makes these slabs a treat that everyone will love.

Why Make This Recipe

This recipe is great for many reasons. First, it uses fresh rhubarb, which adds a wonderful tartness that pairs perfectly with the sweetness of the sugar. Second, the buttery crust is simple to make and brings a lovely texture to the dish. Finally, these poptart slabs are fun to serve and can be sliced into squares for easy sharing. They are perfect for dessert or a sweet snack!

How to Make Buttery Rhubarb Poptart Slabs

Ingredients

2 1/2 cups all-purpose flour
1 tablespoon granulated sugar
1 teaspoon salt
1 cup unsalted butter, cold and cubed
6 tablespoons ice water (more as needed)
2 cups rhubarb, chopped
1/2 cup granulated sugar
1 tablespoon cornstarch
1/2 teaspoon vanilla extract
1 tablespoon lemon juice
1 cup powdered sugar
2 tablespoons milk
1/2 teaspoon vanilla extract
Sprinkles (optional)
Freeze-dried raspberries, crushed (optional)

Directions

In a large mixing bowl, whisk together the flour, granulated sugar, and salt.
Add the cold butter cubes. Use a pastry cutter or your fingers to mix until the mixture looks like coarse crumbs.
Gradually add ice water, one tablespoon at a time. Mix just until the dough holds together.
Divide the dough in half, shape it into disks, wrap in plastic, and refrigerate for at least 30 minutes.
Meanwhile, make the filling. In a saucepan over medium heat, combine the rhubarb, sugar, cornstarch, vanilla, and lemon juice. Cook for 8–10 minutes, until the filling thickens. Let it cool.
Preheat the oven to 375°F (190°C). Line a baking sheet with parchment paper.
Roll out one disk of dough into a rectangle. Place it on the baking sheet.
Spread the rhubarb filling evenly over the dough, leaving a 1/2-inch border.
Roll out the second disk and lay it over the top. Press the edges with a fork to seal.
Poke the top with a fork for steam vents.
Bake for 30–35 minutes, until golden brown. Let it cool completely.
In a bowl, whisk together the powdered sugar, milk, and vanilla to make a glaze. Drizzle over the cooled slab.
Top with sprinkles or crushed raspberries if desired.
Slice into squares or rectangles to serve.

How to Serve Buttery Rhubarb Poptart Slabs

Serve these poptart slabs at room temperature. They are perfect for a tea party, picnic, or as a sweet treat after dinner. You can enjoy them on their own or paired with a scoop of vanilla ice cream for an extra special dessert!

How to Store Buttery Rhubarb Poptart Slabs

Store any leftover poptart slabs in an airtight container at room temperature for up to three days. If you want to keep them longer, you can refrigerate them for up to a week. To reheat, simply place them in a warm oven for a few minutes.

Tips to Make Buttery Rhubarb Poptart Slabs

Ensure your butter is very cold for a flakier crust.
If you can’t find fresh rhubarb, you can use frozen rhubarb—just thaw and drain any excess water before cooking.
Feel free to adjust the sweetness of the filling by altering the amount of sugar used.

Variation

For a twist, try adding berries like strawberries or blueberries to the rhubarb filling. This can enhance the sweetness and add extra flavor.

FAQs

1. Can I use another fruit instead of rhubarb?
Yes! You can substitute with fruits like strawberries or peaches, but you may want to adjust the sugar depending on the fruit’s sweetness.

2. Can I freeze the poptart slabs?
Yes, you can freeze the unbaked slabs. Wrap them tightly in plastic wrap and place in a freezer bag. Bake from frozen, adding a few extra minutes to the baking time.

3. What can I serve with these slabs?
These slabs are delicious on their own but pair well with whipped cream, ice cream, or a cup of tea. Enjoy!