01 -
Preheat the oven to 180°C (350°F). Lightly grease an 11x7-inch baking dish.
02 -
Combine the cake mix, melted butter, eggs, and 1 teaspoon of vanilla extract in a bowl. Mix well and spread into an even layer in the prepared baking dish.
03 -
Bake in the preheated oven for 16 to 18 minutes, or until a toothpick inserted into the center comes out clean. Let the brownies cool in the pan for about 20 minutes.
04 -
Puree the chopped strawberries and the remaining 1 teaspoon of vanilla extract using a food processor or immersion blender until smooth.
05 -
Stir the strawberry puree into the confectioner's sugar until smooth. Add extra sugar if necessary to achieve a glaze consistency. Mix in the kosher salt.
06 -
Spread the strawberry glaze evenly over the cooled brownies. Let the glaze set completely before cutting into 12 squares, or refrigerate until ready to serve.