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Rhubarb Bars

Rhubarb Bars

Make Rhubarb Bars: bright rhubarb and buttery crust come together in easy, slice-and-serve bars.

Prep Time20 minutes
Cook Time55 minutes
Total Time75 minutes
Yield12

Ingredients

Instructions

Step 1: Make the crust

Preheat the oven to 350°F and line a 9x9-inch square baking dish with a single sheet of parchment paper, leaving two opposite long edges long for easy removal. In a bowl combine the 1 cup all-purpose flour and ⅓ cup confectioners' sugar, then work in ½ cup cold diced butter until the pieces are no larger than pea-sized and the mixture reads as a cohesive, sandy crumble with small buttery clusters. Press this compact, slightly pebbly dough evenly into the lined pan so the surface is smooth and level. Bake until the edges are just barely golden, about 12–15 minutes; the crust should feel set, pale golden with a faint crackle where it will give a crisp, tender base.

Step 2: Make the filling and assemble

In a medium bowl lightly beat two room-temperature eggs until glossy, then whisk in 1¼ cup granulated sugar, ¼ cup flour, ½ teaspoon kosher salt, ½ teaspoon cinnamon and 1 teaspoon vanilla until the mixture is smooth and pourable — pale, slightly creamy, and syrupy from the sugar. Gently fold in 3½ cups diced rhubarb so the small ruby wedges are evenly distributed and the batter clings around each piece without turning completely pink. Pour this chunky, jewel-toned filling evenly over the hot crust in the same parchment-lined 9x9 pan so the batter nests into the crumbly base and the rhubarb sits visibly throughout the top layer.

Step 3: Bake until just set and cool

Return the assembled pan to the oven and bake for 35–40 minutes until the filling is almost set — the edges will firm and the center will still have a slight, tremulous jiggle. The top should be a pale, golden sheen with translucent ruby pockets where the rhubarb softened; the interior should read custardy and studded with softened rhubarb pieces while the crust remains a sturdy, crumbly foundation. Remove from the oven and let the bars cool on the white quartzite surface at room temperature for at least 30 minutes so the filling fully firms and the bars slice cleanly.

Step 4: Cut and present

Using the parchment sling, lift the square slab from the pan and cut into bars while the slab is at room temperature or slightly warm; each bar should reveal three clear layers: a compact, golden crumb base, a glossy, creamy rhubarb-studded filling with visible translucent fruit pieces, and a thin, pale, flaky top. Arrange the bars back into the original square geometry of the pan or on a similarly rectangular parchment-lined tray so the final presentation preserves the baked shape and showcases the textural contrast between crumb, custard, and fruit.

Notes