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A close up of a stack of Finnish flatbread slices next to a napkin and glass of milk

Quick Finnish Flatbread with Oats and Barley (Rieska)

An easy, everyday flatbread made with oats, barley and buttermilk. Only 30 minutes from start to finish!
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Course: Breads and Buns
Cuisine: Finnish, Nordic, Scandinavian
Keyword: easy flatbread, flatbread, flatbread recipe, homemade flatbread
Prep Time: 10 minutes
Cook Time: 15 minutes
Total Time: 25 minutes
Servings: 12 squares
Calories: 153kcal
Author: Kristi



  • ½ cup old fashioned rolled oats + 2 tablespoons for sprinkling
  • 1 cup barley flour feel free to substitute rye or whole wheat
  • 1 cup all-purpose flour
  • 2 teaspoons baking powder
  • ½ teaspoon baking soda
  • ¾ teaspoon fine salt
  • 2 tablespoons granulated sugar
  • 4 tablespoons unsalted butter melted and cooled
  • 1 ½ cups buttermilk


  • Preheat the oven to 475 degrees.  Grease a 9 x 13 baking pan or spray with nonstick spray.  Set aside. 
  • Whisk ½ cup of oats, barley flour, all-purpose flour, baking powder, baking soda, salt and sugar together in a medium bowl.
  • Combine butter and buttermilk.  Stir together with a fork (the butter may clump slightly, but this is fine).
  • Add the wet ingredients to the dry ingredients.  Gently mix with a fork until just incorporated.  Transfer the dough to the prepared pan and smooth the top (a small offset spatula works well for this).  Sprinkle evenly with 2 tablespoons of oats.  Bake until bread springs back to the touch and is beginning to turn golden brown, about 15-17 minutes.
  • Transfer the pan to a wire rack to cool.  Cut flatbread into 2 inch squares to serve.  The flatbread is best the day it is baked, but leftovers can be stored in an airtight container and room temperature for a day or so.


  • When you add the wet ingredients to the dry ingredients, don't over mix. This can lead to a not so tender final product. Gently mix with a fork until everything JUST comes together.
  • Use a small offset spatula to smooth out the top of the dough. If you don't have one, a rubber spatula or even damp fingers will do the job just fine.


Calories: 153kcal | Carbohydrates: 23g | Protein: 4g | Fat: 5g | Saturated Fat: 3g | Cholesterol: 13mg | Sodium: 295mg | Potassium: 102mg | Fiber: 2g | Sugar: 4g | Vitamin A: 166IU | Calcium: 82mg | Iron: 1mg