Created by ForeverMama on September 1, 2021
Step 1: Preheat the oven to 350° and butter a 9x13-inch baking pan; set aside.
Step 2: Set an oven rack to the middle position.
Step 3: In a medium-size bowl, whisk together the flour, sugar, baking powder, and salt. Add the oil, milk, and eggs. Mix with an electric mixer until well combined.
Step 4: Pour the batter into the prepared pan; then evenly sprinkle the blueberries on top.
Step 5: In a small bowl, combine the sugar and cinnamon; then sprinkle over the blueberries. Bake until a cake tester inserted into the center comes out clean, about 50 minutes.
Step 6: Makes: approximately 18 squares.