Sticky gingerbread pudding with butterscotch sauce

Name: Sticky gingerbread pudding with butterscotch sauce
Prep time: 20 min
Cook time: 2 h 15 min
Total time: 2 h 35 min
Cuisine: British, European
Ingredients: 2 cups self-raising flour; 1 tbsp ground ginger; 1 tsp mixed spice; 2/3 cup dark brown sugar; 2 tbsp chopped glacé ginger, plus extra to serve; 3 eggs, lightly beaten; 1/2 cup milk; 1/4 cup treacle; 185g Western Star Chef's Choice Cultured Unsalted Butter, melted, cooled; Whipped cream, to serve; Roughly chopped walnuts, to serve; 100g Western Star Chef's Choice Cultured Unsalted Butter, chopped; 1 1/2 cups dark brown sugar; 1 1/2 cups thickened cream