Description
Rhubarb Oat Bars bring spring’s tangy sweetness right to your kitchen counter, creating a delightful treat that connects seasonal produce with simple baking magic. Crumbly oat layers sandwich tart rhubarb filling, delivering a perfect balance of rustic charm and homemade comfort that makes dessert feel like a warm welcome home.
Ingredients
Scale
Main Ingredients:
- 3 cups rhubarb, chopped
- 1 ½ cups all-purpose flour
- 1 ½ cups old-fashioned oats
- ¾ cup butter, melted
- 1 cup brown sugar
Liquid and Binding Ingredients:
- ½ cup water
- ½ cup granulated sugar
- 2 tablespoons cornstarch
- 1 teaspoon vanilla extract
Seasoning and Leavening Ingredients:
- ½ teaspoon baking soda
- ¼ teaspoon salt
Instructions
- Combine 3 cups chopped rhubarb, ½ cup granulated sugar, 2 tablespoons cornstarch, and ½ cup water in a medium saucepan. Cook over medium heat until mixture reaches a rolling boil, then reduce heat and simmer for exactly 5 minutes, stirring constantly until your filling thickens and becomes glossy.
- Whisk 1 ½ cups all-purpose flour, 1 ½ cups old-fashioned oats, 1 cup packed brown sugar, ½ teaspoon baking soda, and ¼ teaspoon salt in a large mixing bowl until thoroughly blended.
- Pour ¾ cup melted butter into your dry ingredients, stirring until the mixture transforms into coarse, sandy crumbs that hold together when gently pressed.
- Transfer ⅔ of the crumb mixture into a greased 9×9-inch baking pan, pressing firmly to create an even, compact base layer that covers the entire bottom.
- Spread your rhubarb filling evenly across the crust, ensuring complete coverage from edge to edge.
- Sprinkle remaining crumb mixture over the filling, creating a rustic, uneven topping that allows glimpses of the vibrant rhubarb underneath.
- Slide the pan into a preheated oven at 350°F (175°C) and bake for 30-35 minutes until the top turns golden brown and the edges start bubbling.
- Remove from oven and let the bars cool completely in the pan for at least 2 hours, allowing the filling to set and the flavors to meld together.
- Once cooled, slice into 12-16 square bars using a sharp knife, wiping the blade clean between cuts for neat edges.
Notes
- Swap rhubarb with strawberries or mixed berries for a different flavor profile that works equally well.
- Measure cornstarch carefully to ensure the filling thickens without becoming too stiff or runny.
- Refrigerate bars for an hour before cutting to get clean, crisp edges that hold their shape.
- Use quick oats if you prefer a more delicate texture in the crust and topping.
- Prep Time: 15 minutes
- Cook Time: 35 minutes
- Category: Dessert Bars
- Method: Boiling
- Cuisine: American
Nutrition
- Serving Size: 9
- Calories: 224 kcal
- Sugar: 14 g
- Sodium: 120 mg
- Fat: 7 g
- Saturated Fat: 4 g
- Unsaturated Fat: 3 g
- Trans Fat: 0.1 g
- Carbohydrates: 37 g
- Fiber: 2 g
- Protein: 3 g
- Cholesterol: 20 mg