Preheat the oven to 350 degrees Fahrenheit. Grease a 9x9 inch pan and line it with parchment paper.
In a double boiler over medium-low heat, melt 8 oz (226 g) of high-quality white chocolate bars along with ¾ cup (168 g) of unsalted butter, chopped into small cubes. Stir continuously until the white chocolate is evenly melted, then remove from heat.
In a large bowl, whisk together 2 eggs, 2 egg yolks, 1 ¼ cups (250 g) granulated white sugar, and 1 tablespoon (15 ml) vanilla extract until the mixture becomes pale and smooth. Alternatively, use an electric hand mixer at high speed for ease.
Pour the melted butter and white chocolate mixture into the egg mixture, whisking until well combined and smooth.
Using a rubber spatula, gently fold in 1 ¾ cups (219 g) of all-purpose flour (spooned and leveled) and ¾ teaspoon salt until just combined.
Place 2 ½ cups (50 g) of freeze-dried strawberries in a food processor and pulse until finely ground. Fold the ground freeze-dried strawberries into the batter.
Pour the strawberry brownie batter into the prepared pan and use a mini offset spatula to smooth the batter evenly.
Bake for 28-31 minutes, or until a toothpick inserted into the center comes out clean. Allow the brownies to cool completely in the pan on a wire rack.
Once cooled, use a butter knife to loosen the edges of the brownies from the pan, then gently turn it over to release.
In a bowl, mix 2 cups (270 g) powdered sugar and 2-3 tablespoons (30-45 ml) of whole milk until smooth.
In a food processor, pulse ¼ cup (5 g) of freeze-dried strawberries until finely ground. Mix the ground freeze-dried strawberries into the icing.
Pour the icing over the cooled brownies and smooth it out with a mini offset spatula. Allow the icing to set, then cut the brownies into 16 squares and enjoy!