1. In a saucepan, bring 1 cup brown sugar and coffee to a boil. Cook and stir for 3 minutes. Remove from the heat and add butter and vanilla when slightly cool. In a bowl, add the flour, baking powder, salt and remaining brown sugar. Stir in milk until smooth. add dates and pecans to create the cake batter.
Pour the brown sugar syrup an 8-in. Oblong baking dish. Spread batter over syrup. Bake at 350° for 35- 45 minutes or until a toothpick inserted near the center of cake topping comes out clean.
Scoop cake onto a plate and spoon syrup over, serve with dollop of creme fraiche.