Preheat the oven to 375°F, and line an 8x8-inch baking pan with parchment paper. Spray the sides of the parchment paper with cooking spray.
In a large bowl, use an electric mixer to cream together the butter, brown sugar, and granulated sugar. Beat in the vanilla until combined.
¾ cup unsalted butter, ⅔ cup light brown sugar, ¼ cup granulated sugar, 1 teaspoon pure vanilla extract
Stir in the oats, flour, cinnamon, baking powder and salt until a crumbly texture starts to form.
1 ½ cups old-fashioned rolled oats, ⅓ cup all-purpose flour, ½ teaspoon ground cinnamon, ½ teaspoon baking powder, ¼ teaspoon salt
Press half of the mixture into the pan. Spoon 1 ½ cups of the strawberries on top of the crust.
1 ½ cups fresh strawberries
Crumble the remaining oat mixture on top of the strawberries. Spoon the remaining strawberries over the top.
½ cup fresh strawberries
Bake for 25-30 minutes or until the crust is golden brown and cooked through. Allow the bars to cool for at least 30 minutes before slicing and serving.
See post for storage options.