Pre-heat oven to 350
Melt butter and 1 1/2 cups chocolate chips in microwave.
Stir every 30 seconds; continue to heat until the chips and butter are smooth
Add sugar, vanilla, and coffee granules
In a small bowl, whisk the eggs together for one minute (until the eggs are bubbly on top)
Stir the eggs into the chocolate mixture
Add flour, cocoa powder, and baking powder
Stir just until combined
Stir in the remaining 1/2 cup chocolate chips
Spread batter evenly into a greased baking pan
Bake 28-30 minutes (350 oven) or until the brownies are set
Dust with powdered sugar (optional)