Spiced Rhubarb Crumble Pie

Pulling from the many different rhubarb recipes I have saved, this is the latest rhubarb pie, and the best one so far, I think! Definitely on the tart side, as that’s how we prefer it.

Spiced Rhubarb Crumble Pie

Course: Dessert
Keyword: rhubarb


  • 1 pie dough single crust


  • ½ cup rolled oats
  • ½ cup sugar
  • 1/2 cup brown sugar packed
  • ½ cup flour
  • ½ tsp kosher salt
  • ¼ tsp five-spice powder
  • ½ cup unsalted butter


  • 6 cups chopped rhubarb 1/2 in. pieces, approx 2-2½ pounds
  • ½ cup sugar
  • ½ cup brown sugar packed
  • ½ tsp kosher salt
  • 1 tsp vanilla
  • ¼ tsp cardamom
  • ½ cup tapioca flour


  • Preheat oven to 425°F with rack in the bottom third of the oven. If you have one, place baking stone on rack.
  • Line 9-inch pie plate with a single crust, crimp edges and refrigerate/freeze for at least 10 minutes.

For the topping

  • Combine all the dry ingredients in a large bowl. Toss the butter with the dry ingredients and mix/rub with a fork/pastry cutter/your fingers until crumbly. You should have big and small lumps. Refrigerate until needed.

For the filling

  • Toss the rhubarb, sugar, brown sugar, salt, vanilla, and cardamom in a large bowl. Add the tapioca flour and mix until no dry spots of flour remain. Let sit for 20 minutes.


  • Pour filling into the crust. Scatter the topping evenly over the top. Place pie plate on foil-lined rimmed baking sheet in the oven.
  • Bake for 10 minutes at 425°F. Reduce oven to 375°F and bake for an additional 40-50 minutes, until the crust is a deep golden brown and filling is bubbling. You may need to cover the edges/top if it starts to brown too much, so check after 30-40 minutes.
  • Try to let the pie cool until close to room temperature before serving to give the pie a chance to set.