Walnut croissants

Ingredients :

 250 g of ointment butter
 1 pot of thick fresh cream (250 cl)
 600 g to 700 g of flour
 1 bag of chemical yeast
 1 bag of vanilla sugar Stuffed :
 200g crushed nuts,
 1 teaspoon cinnamon powder,
 3 c meal sugar soup
 optional loukoum nature (1 dozen loukoum), or date purée (1 cup tea), or raisins (1/2 cup tea)