1Bring water to a boil in a medium-sized pot. Add vegetable oil, sugar, and salt. Stir to combine. Add flour and turn off heat. Stir continuously and vigorously with a wooden spoon until dough balls up and follows your spoon around the pan, 1 to 2 minutes. Set aside to cool when dough feels firm and supple.
3While oil heats, combine heavy cream, dark chocolate, chocolate-hazelnut spread, butter, sugar, and ground coffee in a pan set over lowest heat. Stir often to ensure even melting, 3 to 5 minutes.