Preheat oven to 350 degrees. Butter and flour 2- 8" cake pans or 1- 9"x13" cake pan. Sift the flour, sugar, cocoa, baking soda, and salt into a large bowl. In another bowl, combine the buttermilk, eggs, ADAMS BEST VANILLA, and cooled coffee. With the mixer on low speed, slowly incorporate the wet ingredients. With mixer still on low, add the dry ingredients until well combined, scraping the bottom of the bowl with a rubber spatula. Pour the batter into the prepared pans and bake for 35 to 40 minutes, or until a toothpick comes out clean. Cool in the pans for 30 minutes, then turn them out onto a cooling rack and cool completely. Place 1 layer, flat side up, on a flat plate or cake pedestal. With a knife or offset spatula, spread the top with frosting. Place the second layer on top, rounded side up, and spread the frosting evenly on the top and sides of the cake. See frosting recipes under "Icings & Frostings" in Desserts.