Wonderful combination of crispy and chewy, not-too-sweet with just a hint of coffee that hits the spot.
Preheat oven to 325°F.
Using a double boiler, melt the butter and semi-sweet chocolate morsels over medium heat. Or in a small pot over very low heat. Allow mixture to cool to room temperature.
In a small bowl, combine the flour, cocoa powder, salt and baking soda. Set aside.
In a large mixer bowl, beat the sugar, eggs and vanilla extract until well-combined and fluffy. Gradually add the cooled chocolate mixture to the egg mixture; beat until combined. Gradually add the flour mixture; beat until just incorporated.
Using a rubber spatula or wooden spoon, stir in the espresso morsels.
Drop onto ungreased baking sheet by rounded tablespoons. Bake for 8 to 10 minutes or until edges are firm, but center is still slightly soft.
Cool cookies on baking sheet for 2 minutes before transferring them to a wire rack to finish cooling.