Spray a 9x13 pan with cooking spray. On the bottom, lay the strawberries first, then the blueberries on top, and squeeze juice of 1 lemon over the berries.
In a medium bowl, mix together the melted butter, milk, sugar, salt, baking powder, flour, vanilla, and almond extract. Pour over the berries.
For topping:
In the same bowl, add the remaining 1/2 cup of sugar and 2 Tbsp cornstarch. Mix together and sprinkle on top of the cobbler mixture.
Over the entire cobbler, pour 2 cups of boiling water.
Bake for 1 hour. Serve warm with vanilla ice cream or fresh whipped cream!