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Oatmeal Rhubarb Bars

These Oatmeal Rhubarb Bars combine a buttery oat crumble with a tangy rhubarb filling for the ultimate wholesome spring dessert. Easy to prepare in under 45 minutes, they work beautifully as a snack, breakfast bar, or healthy dessert.
Prep Time10 minutes
Cook Time35 minutes
Total Time45 minutes
Course: Breakfast, Dessert, Snack
Cuisine: American
Keyword: easy rhubarb recipes, healthy rhubarb dessert, oatmeal rhubarb bars, rhubarb crumble bars, strawberry rhubarb bars
Servings: 9 bars
Calories: 290kcal
Cost: 8

Equipment

  • 8x8 or 9x9 inch baking pan
  • mixing bowls
  • measuring cups and spoons
  • pastry cutter Optional
  • parchment paper
  • spatula or spoon

Ingredients

  • 3 cups fresh rhubarb, diced small
  • 1/2 cup granulated sugar or coconut sugar
  • 1 tbsp cornstarch
  • 1 tsp vanilla extract
  • 2 cups rolled oats
  • 1 cup all-purpose flour or oat flour
  • 3/4 cup brown sugar, packed
  • 1/2 tsp ground cinnamon
  • 1/4 tsp salt
  • 3/4 cup cold butter, cubed or solid coconut oil

Instructions

  • Preheat your oven to 350°F (175°C). Grease an 8x8 or 9x9 inch baking pan and line it with parchment paper, leaving overhang for easy lifting.
  • In a medium bowl, combine the diced rhubarb, granulated sugar, cornstarch, and vanilla extract. Stir well and let the mixture sit while preparing the crumble.
  • In a large bowl, stir together the rolled oats, flour, brown sugar, cinnamon, and salt until evenly combined.
  • Add the cold cubed butter to the oat mixture. Use your fingertips or a pastry cutter to work it in until the mixture resembles coarse crumbs with some pea-sized pieces remaining.
  • Press about two-thirds of the oat mixture firmly into the bottom of the prepared pan to create an even crust.
  • Spread the rhubarb filling evenly over the oat base, making sure it reaches all corners of the pan.
  • Sprinkle the remaining oat crumble evenly over the top without pressing it down.
  • Bake for 35 to 40 minutes until the top is golden brown and the filling is bubbling around the edges.
  • Remove from the oven and allow the bars to cool completely before slicing into squares.

Notes

For strawberry rhubarb bars, replace half the rhubarb with strawberries. For a gluten-free version, use oat flour and certified gluten-free oats. Coconut oil works well instead of butter for a vegan option. Let the bars cool completely before slicing for clean edges and the best texture.