1Preheat oven to 425°F. Spray a rimmed baking sheet (about 18x13) with cooking spray and set aside.
2In a large bowl, whisk Bisquick, eggs, milk, and vanilla until thoroughly combined (don't over mix).
3Pour batter into pan, spreading evenly to edges. Sprinkle blueberries over the batter.
4Bake for 15-20 minutes or until light golden brown and a toothpick comes out clean. Cut into squares and serve with butter and syrup and/or powdered sugar
Ingredients
4 Cups Bisquick Pancake & Baking Mix
4 large eggs
2 cups milk
1 teaspoon vanilla extract
1 to 2 cups fresh blueberries (save some for serving)