In a small bowl, whisk 2 tablespoons espresso powder with ¼ cup warm water. Set aside.
Heat the oven to 350°F (175°C). Spray a 9x13-inch baking pan with non-stick baking spray.
In a large bowl, whisk together the melted butter, canola oil, and sugars until well blended. Incorporate the eggs and the prepared espresso mixture.
In another large bowl, combine flour, cocoa powder, salt, and baking powder.
Gradually mix the dry ingredients into the wet mixture until just combined. Fold in the chocolate chips.
Pour the batter into the prepared baking pan. Bake for 25-30 minutes or until a toothpick inserted into the center comes out clean. Let cool completely.
In a small bowl, dissolve 4 tablespoons espresso powder in ¼ cup warm water. In a stand mixer, beat together the softened butter, powdered sugar, heavy whipping cream, and the espresso mixture until smooth. If needed, add more powdered sugar to reach desired consistency.
Spread the frosting evenly over the cooled brownies.
Heat the heavy cream in a small pot until it begins to boil. Pour over the chocolate chips in a medium bowl, let sit for a minute, then whisk until smooth. Transfer to the piping bag, snip the tip, and drizzle over the frosted brownies.
Refrigerate for an hour before cutting and serving. Enjoy!