No Thanks
Keep In Touch With

Sign up and we'll send inspiration straight to you.

Martha Stewart takes your privacy seriously. To learn more, please read our Privacy Policy.

Rhubarb Buckle

This dessert belongs in everyone's "outdoor entertaining" file. The cake squares, embellished with moist fruit and a crunchy topping, are meant to be eaten out of hand.

  • Prep:
  • Total Time:
  • Yield: Makes 32 squares
Rhubarb Buckle

Photography: Dana Gallagher

Source: Martha Stewart Living, May 2012


For the Cake

  • Vegetable-oil cooking spray, for cake pans
  • 1 pound plus 10 ounces rhubarb, trimmed and cut 1/2 inch thick on the bias
  • 2 cups sugar, divided
  • 2 cups all-purpose flour
  • 1 1/4 teaspoons baking powder
  • 1 teaspoon coarse salt
  • 1 1/2 sticks unsalted butter, softened
  • 1 teaspoon finely grated lemon zest
  • 3 large eggs
  • 1 teaspoon pure vanilla extract
  • 1/2 cup sour cream

For the Crumb Topping

  • 1 cup all-purpose flour
  • 1/4 cup light-brown sugar
  • 1/4 teaspoon coarse salt
  • 1/2 stick unsalted butter, melted


  1. Make the cake: Preheat oven to 350 degrees, with rack in center position. Coat two 9-inch square cake pans with cooking spray, and line with parchment, leaving an overhang on 2 sides. Stir together rhubarb and 1 cup sugar; set aside to macerate.

  2. Whisk together flour, bak ing powder, and salt. Beat together butter, remaining cup sugar, and the lemon zest until light and fluffy. Beat in eggs, 1 at a time, then beat in vanilla. Beat in flour mixture in 2 additions, alternating with sour cream, beginning and ending with flour mixture.

  3. Make the crumb topping: Stir together flour, brown sugar, and salt. Add melted butter; stir to combine.

  4. Divide batter between pans. Top with rhubarb mixture, and sprinkle with crumb topping. Bake until golden on top and cooked through, about 1 hour 5 minutes. Let cool completely in pans on wire racks, then lift cakes from pans using parchment. Remove parchment. Before serving, cut buckle into 2-inch squares.

Cook's Note

Cakes can be wrapped in plastic wrap and stored at room temperature for 1 day.

Reviews (2)

  • dmwoods 23 May, 2013

    Wonderful recipe! I made a few adjustments - I used gluten free flour (trader joes brand), did half strawberries and half rhubarb, doubled the crumble top by adding 2/3 c. oatmeal and 1/2 stick extra butter. I baked it in one 9X11 pan for 50 minutes. So delicious! Moist, sweet but not too sweet, and great crumbly top. Will use again!

  • Pogogirl 10 Mar, 2013

    This really is very good - I made it several times last year and look forward to a good rhubarb crop this year to make more. I had never used rhubarb any other way but with strawberries in a pie, and it was such a treat to find this recipe.

Related Topics