01 -
Preheat oven to 350°F. Line an 8x8 inch pan with parchment paper, leaving an overhang or grease foil if used.
02 -
In a microwave-safe bowl, combine chopped chocolate, butter, and instant coffee. Microwave in 45-second intervals on medium power, stirring until smooth, or melt over a double boiler.
03 -
Allow chocolate mixture to cool slightly. Whisk in sugar, eggs, and vanilla extract until fully incorporated.
04 -
Gently fold in flour and salt until just combined.
05 -
Pour batter into prepared pan and smooth surface. Bake 23 to 28 minutes until top is set and toothpick inserted near center comes out clean or with moist crumbs.
06 -
Cool brownies completely in the pan on a wire rack before frosting.
07 -
Dissolve instant coffee powder in boiling water using a fork. Chill until fully cooled.
08 -
Beat softened butter with mixer for 1 minute until fluffy. Add 1 cup sifted powdered sugar, vanilla, and salt on low speed until combined.
09 -
Beat in cooled coffee mixture carefully to avoid melting butter.
10 -
Gradually add remaining powdered sugar in 1/2 cup increments, beating until desired sweetness and texture. Add whipping cream if frosting is too stiff.
11 -
Remove cooled brownies from pan using parchment overhang. Spread frosting evenly using a flat-edge knife. Slice with a sharp knife to serve.