Preheat the oven at 350°F . Grease two 8-inch cake pans. Freeze a mixing bowl.
Add the described quantity of flour, sugar, baking powder and salt, mix together in a bowl.
Boil the unsweetened chocolate over the simmering water. Stir continuously, scraping the sides to avoid scorching, until chocolate is melted. Leave aside to cool.
Take a bowl and beat eggs until thick, about 5 minutes.
Take a cold bowl from the freezer, pour whipping cream mix until stiff. Fold in melted chocolate, eggs and vanilla extract. Add flour mixture while beating, folding softly after every addition, until combined. Pour into the cake pan.
Bake (35-40 minutes) until the inserted wooden pick at the center comes out clean.
In a bowl stir coffee granules, whiskey and sugar until coffee is dissolved. Sprinkle the mixture over the layer of cake.
For icing, mix coffee granules and Irish cream, adding butter and vanilla extract and beat until the mixture is combined. Gradually add powdered sugar until smooth. Frost the sides and top of the cake. Top the cake with chocolate chips.