• Preheat the oven to 350 degrees Fahrenheit.
• Take a sheet of parchment paper and place it into a 9 X 13-inch baking dish and set aside.
• Put 2 cups Flour and 2 cups Old Fashioned Oats in a medium bowl and then stir well.
• To the flour mixture, add 1 cup Brown Sugar, 1 tsp Baking Powder and 1/4 tsp Salt, then mix well to combine.
• Use a box shredder to shred the butter into the flour mixture, then mix well with a spatula. It should resemble dry crumbles.
• Place the 2 cups Blueberries into a medium bowl and then add 1/2 cup sugar and mix well with a spatula, then add 1/2 cup corn starch and stir well.
• Pour half of the dry mixture into the prepared baking dish and then press down.
• Pour out the blueberries on top of the pressed-down flour mixture, then spread it out evenly.
• On the top of the 2 cups Blueberries, add the rest of the dry mixture and spread it out evenly, then gently press it down with a spatula.

Bake the Bars

• Place the baking dish into the oven and bake for 60 minutes, or until the top is browned nicely.
• Remove the Blueberry and Oatmeal Bars from the oven and rest to cool 10 minutes before cutting into slices.
• Finally, slice, serve and enjoy!