Directions

• Adjust the oven rack to the 2nd level mark (just above center) and preheat your oven to 350 F. Line two baking sheets with parchment paper or silicone mats. Set to the side.
• In a medium bowl, whisk together the all-purpose flour, baking powder and salt. Set to the side.
• Using a hand mixer or stand mixer fitted with the paddle attachment, beat the eggs, egg yolk, granulated sugar, vegetable oil and vanilla extract together on medium high speed until fully combined and frothy.
• Meanwhile, in a small saucepan, heat the semi-sweet chocolate chips and unsalted butter together over medium heat until fully melted and smooth. Remove from the heat and immediately whisk or stir in the unsweetened cocoa powder and espresso powder.
• Carefully pour the melted chocolate mixture into the wet ingredients and mix until the chocolate is just combined.
• Add in the whisked dry ingredients and mix on low speed until just combined.
• Using a 1 1/2 Tbsp.-size cookie scoop or 2 spoons, scoop the cookie dough out and place onto the baking sheets, leaving about 1 1/2 inches of space between them.
• Sprinkle some sea salt flakes over the top of each cookie, then bake for 8 to 10 minutes at 350 F or until the tops of the cookies have a shiny, crackly top to them.
• Remove from the oven and top with a few additional chocolate chips (optional).
• Let the cookies cool on the baking sheets for about 5 minutes before transferring them to a cooling rack to cool almost completely – because they are really good still warm. Use a spatula to transfer the cookies because they will be very soft.
• Cookies are best kept in a sealed food container at room temperature for up to 2 days.
  
  Please note: The Jersey Girl used three baking sheets so that the cookies had plenty of space. She bakes one tray at a time. She checks the cookies at 8 minutes during baking to make sure they do not burn. She omits the espresso powder. She DEFINITELY tops with extra chips.