In a bowl, knead the flour, yeast, vanilla seeds, eggs, sugar, honey and salt for about 5 minutes until a smooth dough forms.
Add the butter and knead for another 10 minutes until it is completely incorporated and the dough pulls cleanly away from the sides of the bowl.
Place the dough in a floured bowl, cover with a damp cloth and let it rise in the refrigerator for 8 hours.
After the dough has risen, roll it out on a floured work surface until it reaches about 10 inches in diameter. Let it rise again for 2 hours.
Press dimples into the dough as you would with focaccia. Brush with heavy cream and sprinkle with sugar. Then spread crème fraîche into the dimples and dot the cake with small pats of butter.