Preheat the oven to 350 F. In a large bowl, whisk together flour, sugar, cocoa powder, salt, and baking soda. Add in eggs, melted butter, and vanilla extract and mix until smooth.
In a large bowl, whisk together cake mix, eggs, and vegetable oil until smooth. Pour the brownie batter into a greased 8-inch square baking dish. Top with the strawberry cookie dough. Bake for 25-30 minutes.