In a large bowl whisk together milk and eggs. Whisk in remaining ingredients except for the berries until fully combined. Stir in berries.
Spray a 12 square non-stick brownie pan or a 9"x 9" non-stick pan with non-stick spray.
Divide batter evenly between squares or pour into prepared 9" x 9" pan.
Bake on the center rack for 28-30 minutes if using the individual brownie pan and about 40 minutes if using the 9"x 9" pan.
Remove from oven and allow to cool for about 20 minutes. They will continue to firm up while cooling and you only need it pleasantly warm to serve. They will be difficult to remove from the individual brownie pan if too warm. Remove from pan and serve with yogurt, fresh berries and a drizzle of maple syrup if desired. If baking for meal prep and saving for later feel free to allow it to cool longer before removing from either pan.
-Use almond milk or other milk substitutes in place of the 2% milk if desired.
-Add a scoop of vanilla protein powder if you want more protein.
-The individual brownie pan is perfect for meal prep baked oatmeal squares.
-Allow the squares to cool completely before wrapping and freezing. Will keep well wrapped for up to one month in the freezer.
-Allow frozen squares to thaw before warming gently in the microwave.