Spiced bundt cake with bourbon caramel sauce

Ingredients

• 200 g softened butter
• 400 g sugar
• 4 eggs
• 200 g crème fraîche 38%
• 1 tbsp. finely-grated orange zest
• 450 g plain flour
• 2 tsp. baking powder
• 1 tsp. bicarbonate of soda
• 2 tbsp. ground cinnamon
• 1 tbsp. ground cardamom
• ½ tsp. ground allspice
• ½ tsp. ground cloves
• 1 pinch of salt
• butter or neutral cooking oil to grease the bundt tin