Prepare the Baking Dish: Preheat your oven to 350°F (175°C). Line an 8x8 inch baking dish with parchment paper, leaving some overhang on the sides for easy removal of the brownies later.
Mix Wet Ingredients: In a large mixing bowl, combine the melted butter and sugar until well blended. Add eggs one at a time, mixing thoroughly after each addition. Stir in the vanilla extract until fully incorporated.
Add Dry Ingredients: Sift the flour, cocoa powder, and salt together, then gently fold into the wet ingredients. Mix just until combined to avoid overmixing, which can make the brownies tough.
Incorporate Chocolate Chips: Fold the dark chocolate chips into the batter, distributing them evenly throughout the mixture.
Layer the Brownie: Pour half of the brownie batter into the prepared baking dish, spreading it evenly. Arrange the sliced strawberries on top of this layer, then spread the strawberry preserves over the strawberries. Cover completely with the remaining brownie batter.
Bake: Place the baking dish in the preheated oven and bake for 35-40 minutes. The brownies are done when a toothpick inserted in the center comes out with a few moist crumbs attached.
Cool: Allow the brownies to cool completely in the pan on a wire rack. This ensures they set properly and are easier to cut.
Finish and Serve: Once cooled, drizzle with melted dark chocolate. Let the chocolate set before cutting into squares and serving.