Mocha Cookies Gelson's

Ingredients

• ¾ cup unsalted butter
• 1 cup packed dark brown sugar
• ⅓ cup granulated sugar
• 1 large Gelson’s egg, room temperature
• 1 egg yolk, room temperature
• 1 Tbsp vanilla extract
• 1 ¾ cups all-purpose flour
• ¼ cup espresso powder
• ½ tsp kosher salt
• ½ tsp baking soda
• 4 oz bittersweet chocolate, roughly chopped