Preheat the oven to 350 degrees F and line a small 6x6 inch pan with parchment.
In a mixing bowl, stir together the melted butter and sugar until smooth. Add the egg, vanilla, red food coloring, and white vinegar and mix well.
Whisk in the flour, cocoa powder, and salt until no streaks remain. Fold in half of the white chocolate chips.
Pour the batter into the prepared pan and smooth the top. Bake for 22 to 25 minutes until a toothpick comes out with a few moist crumbs.
Let the brownies cool in the pan for 10 minutes. Warm the raspberry preserves in a small bowl for 10 seconds in the microwave and drizzle over the top. Scatter the remaining white chocolate chips while the brownies are still slightly warm.