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Strawberry Rhubarb Oat Bars

Delicious and buttery these strawberry rhubarb oat bars are a great way to kick of your summer baking! Easy to make and so tasty, they're perfect for a quick snack or picnic potluck!
Course Dessert
Cuisine American
Prep Time 25 minutes
Cook Time 50 minutes
Total Time 1 hour 15 minutes
Servings 12
Author foodnessgracious


For The Base

  • 2 cups all purpose flour
  • 1/2 cup powdered sugar
  • 8 ounces butter, at room temperature

For The Filling

  • 4 cups sliced strawberries
  • 3 cups sliced rhubarb
  • 1/2 cup sugar
  • 3 tbsp cornstarch
  • 2 tsp vanilla extract

For The Topping

  • 1 cup brown sugar
  • 3/4 cup all purpose flour
  • 3/4 cup rolled oats
  • 1 tsp cinnamon
  • 1/2 cup butter


  • Preheat the oven to 350 degrees F and line a 9x13 inch baking pan with parchment paper.
  • In the bowl of a stand mixer, combine the flour , powdered sugar and softened butter.
  • Mix on low speed until a dough forms.
  • Transfer the dough to the prepared pan and press it down towards the edges of the pan until all of the pan has been covered evenly with dough.
  • Place the base into the oven and bake for 20 minutes.
  • While the base is baking, prepare the filling.
  • Add the sliced strawberries and rhubarb to a large bowl.
  • Add the sugar, vanilla and cornstarch and gently mix through the fruit.
  • When the base is ready take it out of the oven and using a slotted spoon, transfer the fruit to the base.
  • Spread the fruit out evenly.
  • In another bowl, combine the ingredients for the topping except the butter and mix well.
  • Grate the butter into the mixture then rub the butter with your fingertips into evenly sized pebbles of butter.
  • Sprinkle the topping over the fruit and place back into the oven.
  • Bake for 45-50 minutes and the crumb topping is golden.
  • Let the bars cool before slicing into squares.