Preheat oven to 350 degrees. In the bowl of a stand mixer, cream together the butter and the peanut butter until fluffy and smooth, about 2-3 minutes.
Add brown sugar and beat for 1-2 minutes. Add eggs and vanilla and beat until well mixed, scraping down the sides of the bowl when necessary.
In a medium bowl, whisk together the flour, coffee, baking soda and salt.
Slowly add the dry mix to the wet ingredients and mix until well combined. Move the bowl from the stand and stir in the chocolate chips by hand.
Chill the dough for 20 minutes. Not crucial, but recommended. Drop the cookie dough onto an ungreased baking sheet. Flatten the dough slightly and sprinkle with sea salt.
Bake for 10-12 minutes until cookies are golden around the edges. Let them sit on the hot cookie sheet for about 5 minutes to allow the cookies to set.
