The blueberry squares at Starbucks are the inspiration for these Rhubarb Blueberry Oatmeal Bars. I had one of those a while ago, and it was delicious. And I knew I had to make a homemade version. Blueberries are in season now, and we had a bunch of sweet, juicy berries. And we also had rhubarb, so I decided to add that, too. Injecting a little bit of tartness was a good idea because blueberries and rhubarb were perfect together in these squares.
It's Okay to Have a Treat Sometimes
Can we call these rhubarb blueberry oatmeal bars semi-healthy? Yes, there's butter and sugar. But they are made with fruit, and there are oats in there, too. But who am I fooling? These are a treat, no doubt about it. A delicious treat of blueberry rhubarb goodness between buttery oatmeal crispness. And we all need a treat sometimes. Life is about balance, and treats are part of that.
Blueberries are Great in Many Recipes
The best way to eat these fresh juicy blueberries, is of course, just straight up. At least for me. I can just plow through a bowl of these like they were peanuts. But I also like to showcase these luscious local berries in a recipe now and then, too. Like this Finnish Blueberry Pie, or Blueberry French Toast Casserole, or even in a savory dish like Blueberry Sourdough Sausage Stuffing, for your next holiday feast. You can even use these beauties in a cocktail. Try a Blueberry Ginger Martini, you won't regret it.
Can You Freeze These Bars?
The answer is yes. These bars freeze very well. To freeze, allow them to cool completely, then flash freeze them on a tray until just firm. You can then pack the bars in an airtight container or bag. Or you can wrap them individually for a grab & go treat that will be defrosted by lunch or coffee time.
Fun Facts About Blueberries
Did you know:
Blueberries freeze in only 4 minutes.
There are two types of blueberries; highbush, and lowbush. Highbush are the ones we buy in grocery stores and farmer's markets. Lowbush blueberries are smaller and sweeter and are used in jams, pie fillings, preserves, etc. Get more blueberry facts here: 10 Fun Facts About Blueberries
Rhubarb Blueberry Oatmeal Bars
- 3 cups fresh blueberries
- 3 cups rhubarb cut into 1-inch pieces
- juice of one lemon
- 1 cup sugar
- 4 tbsp cornstarch
- 2.5 cups quick-cooking oats
- 1 cup all-purpose flour
- 1 cup brown sugar packed
- ½ tsp baking soda
- ¼ tsp salt
- 1 cup cold butter cut into cubes
- Put blueberries and rhubarb chunks Into a large, stainless steel pot, over medium heat
- Cook, stirring occasionally until rhubarb is softened.
- In a small bowl, whisk sugar and cornstarch together
- Add to fruit mixture, stirring constantly until thickened and smooth.
- Remove from heat.
- Heat oven to 350°. Prepare a 9 x 13 baking pan by spraying with cooking oil, or, lining with parchment paper.
- In a bowl, combine oats, flour, brown sugar, baking soda and salt.
- Using a pastry blender to cut butter into flour mixture until it resembles course crumbs
- Press half the flour mixture into prepared pan to form crust
- Spread blueberry rhubarb mixture over the bottom crust
- Spread remaining flour mixture over the fruit layer, pressing lightly
- Bake in center of oven until golden, about 45 minutes
- Cool completely on a wire rack before slicing into 24 squares