Butter and flour two 9-by-5-inch loaf pans. In a medium bowl, whisk the flour, cocoa powder, baking powder, baking soda, salt and cinnamon. In the mixer bowl, combine the sugar with the eggs, oil, crème fraîche, ginger and vanilla seeds and beat at medium speed until smooth. Gradually beat in the dry ingredients at low speed, scraping down the side of the bowl occasionally. Beat in the carrots.