Preheat oven to 350°F. Spray (1) 8x8-inch baking pan with nonstick spray and line with parchment paper. Set aside.
In a medium bowl, whisk together the eggs, vegetable oil, and vanilla. Use a spatula to stir in the cake mix until well combined, followed by the diced strawberries; the batter will be thick.
2 large eggs, ⅓ cup vegetable oil, ½ teaspoon pure vanilla extract, 1 box strawberry cake mix, ½ cup diced fresh strawberries
Spread the batter evenly into the prepared pan. Bake for 21-25 minutes, or until the edges are puffed and the center is set.
Allow to cool completely.
Once cool, whisk the glaze ingredients together in a small bowl. Spread over the cooled strawberry brownies with an offset spatula.
1 cup powdered sugar, 2 tablespoons strawberry preserves, 1/2 teaspoon lemon zest, 1 tablespoon lemon juice
Notes
Store in an airtight container at room temperature for 2-3 days or in the refrigerator for up to 5 days.