Buttermilk Rhubarb Coffee Cake

What a delicious way to use fresh Rhubarb.  The tartness from the rhubarb and the additional tang from the buttermilk really shine and make a treat with your morning coffee.

Buttermilk Rhubarb Coffee Cake

Buttermilk Rhubarb Coffee Cake

Course: Dessert, Snack

Beautiful cake with the sweet and tart flavor of rhubarb.



  • 1/2 cup Butter Room Temperture
  • 1 Cup Granulated Sugar
  • 1 Large Egg
  • 1 1/2 teaspoon Vanilla Extract
  • 1/2 cup Buttermilk
  • 2 teaspoons Baking Powder
  • 1 teaspoon Salt
  • 2 Cups Rhubarb sliced thinly
  • 2 teaspoons Sanding Sugar to sprinkle on top of cake


  1. Preheat the oven to 350F Lightly butter a 9×9 square baking pan.

  2. Cream butter and sugar in a stand mixer, or with electric beaters, until fluffy and pale yellow. Add the egg and vanilla, scraping down the bowl as necessary.

  3. Pour in buttermilk and mix to incorporate

  4. Take 1 Tablespoon of flour and toss the sliced Rhubarb in it.

  5. Combine remaining flour, bakind powder and salt

  6. Add half the dry ingredients and mix gently. Add remaining dry ingredients and mix until just incorporated, dont overmix.

  7. Fold coated rhubarb into the batter. It will be thick.

  8. Spread batter into prepared pan and sprinkle with sanding sugar.

  9. Bake for 40-45 minutes until a toothpick comes out clean. Remove from oven, cool for 5 minutes before inverting onto a rack to fully cool.

  10. You can slice this cake when it is still warm.

Recipe Notes


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