Step 1

Preheat oven to 350 degrees (F) (175 degreed C). Line an 9x9-inch baking pan with parchment paper. Spray lightly with non-stick baking spray and set aside.

Step 2

In a large bowl, sift together the flour, baking powder, salt, cocoa powder, and espresso powder. Set aside until needed.

Step 3

In a medium saucepan, combine the butter, oil, and 1/2 cup of the sugar. Heat over medium heat, stirring frequently, until butter is completely melted. Remove from heat.

Step 4

In a large mixing bowl, combine the eggs and remaining sugar. Whisk until well combined, about 30 seconds.

Step 5

Slowly, pour the warm butter mixture into the egg mixture, adding it very gradually (a little bit at a time) and whisking constantly until completely combined.

Step 6

Add in the dry ingredients and chocolate chips and, using a rubber spatula, slowly stir until just combined. *Do not over mix! Stop stirring when you see the last trace of dry ingredients. Over mixing will give you cakey brownies.

Step 7

Scrape the batter into the prepared pan and smooth the top.

Step 8

Bake for 30 minutes, or until the edges are firm and the top is shiny and slightly cracked.

Step 9

Place pan on a cooling rack and cool completely before slicing.