01 -
Preheat your oven to 375°F (190°C). Line a 9x13 inch baking pan with parchment paper, ensuring an overhang on the sides for easy removal. This preparation is crucial for achieving the perfect Best Rhubarb Shortbread Bars with Buttery Texture.
02 -
In a large bowl, combine 2 1/2 cups all-purpose flour, 1/2 cup granulated sugar, 1/4 cup powdered sugar, and 1/2 teaspoon fine sea salt. Cut in 1 cup (2 sticks) very cold unsalted butter until the mixture resembles coarse crumbs. Stir in 1 teaspoon vanilla extract.
03 -
Reserve 1 cup of the shortbread mixture for the topping. Press the remaining shortbread mixture evenly and firmly into the bottom of the prepared pan. Use the back of a spoon or your fingers to create a compact base for your Best Rhubarb Shortbread Bars with Buttery Texture.
04 -
In a separate medium bowl, combine 4 cups fresh rhubarb, 3/4 cup granulated sugar, 3 tablespoons cornstarch, 1 tablespoon fresh lemon juice, and 1 teaspoon lemon zest. Toss gently until the rhubarb pieces are evenly coated with the sugar and cornstarch mixture.
05 -
Spread the vibrant rhubarb filling evenly over the pressed shortbread base in the pan. Then, crumble the reserved 1 cup of shortbread mixture evenly over the rhubarb layer. This creates the signature buttery, crumbly topping.
06 -
Bake for 35-40 minutes, or until the shortbread topping is golden brown and the rhubarb filling is bubbly. For the best Best Rhubarb Shortbread Bars with Buttery Texture, ensure the edges are lightly browned and set.
07 -
Allow the bars to cool completely in the pan on a wire rack before lifting them out using the parchment paper overhang. Once cooled, dust generously with a pinch of powdered sugar before cutting into 12 squares.