Line 13x9 pan with foil, use enough so that excess hangs over edges (to easily remove and cut when done cooking)
In small saucepan, heat ⅔ cup water until it just begins to boil. Stir in cocoa powder, instant coffee and 2 oz unsweetened chocolate.
Remove from heat and stir well.
In large, microwave-safe bowl, melt butter. Once butter is completely melted stir in sugar and add chocolate mixture to butter/sugar mix. Stir well.
Add lightly beaten eggs and yolks and vanilla, stirring until completely combined.
In separate bowl, stir together flour, salt, and finely chopped chocolate.
Gradually add flour mixture to chocolate mixture, stirring with spatula until completely combined but just until combined. Set aside and begin cookie mix.
Chocolate Chip Cookie
In microwave safe bowl, melt butter.
Stir in sugars and vanilla, stirring until completely combined.
Add vanilla and egg, stir until combined.
In small separate bowl combine flour, baking soda and salt.
Gradually stir into butter mixture.
Stir in chocolate chips.
Take half of the mixture and press handfuls of it into the bottom of the prepared 13x9 pan.
Pour all of the brownie batter over the mounds of cookie dough so that the brownie batter covers the bottom of the pan.
Press the remaining half of the cookie batter into the top of the brownie batter, breaking it up by hand and inserting in patches, pressing it into the brownie batter so that the surface is fairly level.
Bake on 350F for 30-35 minutes (until toothpick inserted in brownie portion near center comes out mostly clean with just a few crumbs).
Allow to cool completely before removing from pan (lifting out using the excess foil) and cutting.