Preheat your oven to 350 degrees Fahrenheit. Prepare a 9 x 13-inch baking dish by spraying it generously with cooking spray. Alternatively, you may line the dish with parchment paper. Set aside.
In a large mixing bowl, use a hand or stand mixer to mix 1 box of strawberry cake mix, 2 large eggs, and ⅓ cup of vegetable oil until all ingredients are combined. The batter will be thick and gooey.
Pour the brownie batter into your prepared baking dish. Be sure to scrape out as much of the batter as possible from the mixing bowl. Use a rubber spatula or a piece of parchment paper and your hands to distribute the batter across the baking dish evenly.
Bake brownies in preheated oven at 350 degrees Fahrenheit for 15 - 18 minutes or until the edges begin to brown, and you can insert a toothpick or cake tester, and it comes out mostly clean. You don’t want to overcook them.
While baking the brownies, use a medium mixing bowl to whisk 1 cup of powdered sugar, 2 tablespoons of milk or purified water, and 1 teaspoon of strawberry extract until combined.
Once the brownies are removed from the oven and still hot, gently spread the strawberry glaze over the warm brownies and allow them to cool. Be careful when handling the hot baking dish.
Once the brownie is cool, cut it into equal squares, serve and ENJOY!