Preheat the oven to 350°F. Line an 8x8-inch metal baking pan with parchment paper, allowing a 2-inch overhang on all sides to make removing the brownies easier.
Pulverize the freeze-dried strawberries into fine crumbs using a food processor, or place them in a ziplock bag and crush them with a heavy pot. Once finely ground, set them aside.
In a stand mixer fitted with a whisk attachment or hand mixer, beat the eggs, granulated sugar, and vanilla. Mix on medium-high speed for 3-4 minutes until the mixture is light and fluffy.
Melt the butter in a saucepan over medium heat until it is completely liquefied and very hot (you’ll hear it sizzling). Take the saucepan off the heat and stir in the powdered sugar, cocoa powder, espresso, and salt until the mixture is smooth and lump-free.
Once the egg mixture has thickened and lightened in color, pour in the warm cocoa mixture. Mix for about 30 seconds until the batter becomes smooth and has a glossy appearance. Add the flour and freeze dried strawberry powder, and blend just until combined. Gently fold in the chocolate chips.
Transfer the batter to the prepared pan, spreading it evenly. Position it on the center rack of the oven to ensure even baking, avoiding placement too close to the top or bottom. Bake for 20-22 minutes, or until a toothpick inserted into the center comes out with a few damp crumbs but no wet batter. Avoid over baking!
Cool the pan on a wire rack until the brownies are completely cool. Set aside until the ganache is done.