For The Strawberry Brownies: Preheat the oven to 350 degrees F. Set out a 9X13 inch baking dish. Then line it with parchment paper or foil. Set aside.
In a large mixing bowl, combine the cake mixes, eggs, and melted butter. Stir until smooth.
Scoop the thick batter into the prepared pan. Spread it out in an even layer. Then bake for 15-17 minutes. You want the edges to be set and the center to be just baked through, so the texture is fudgy.
For The Brownie Frosting: Allow the strawberry brownies to cool as you make the frosting. In a medium bowl, use a hand mixer to beat the softened butter and cocoa powder together until very smooth.
Scrape the bowl and beat in the corn syrup and vanilla extract. Then turn the mixer on low and beat in the powdered sugar and a pinch of salt.
Add one tablespoon of heavy cream at a time until the brownie frosting is smooth and spreadable.
Slather the frosting over the warm brownies and let them cool to room temperature.
Then lift the entire sheet of brownies out of the pan by the edges of the parchment paper. Cut and serve.
Although I show Duncan Hines cake mix in the photos, my kids have determined these brownies are best made with Pillsbury Strawberry Cake Mix.You can make this recipe with any flavor of cake mix! Try Lemon, Orange, Cherry Chip, Pineapple, Funfetti, or Red Velvet brownies as well.