Sticky Date Slab Pudding With Salted Treacle Sauce

Ingredients

• 500g pitted dates
• 2 1/2 tsp bicarbonate of soda
• 150g unsalted butter, softened
• 1 1/3 cups dark brown sugar
• 3 eggs
• 2 1/2 cups self-raising flour
• 2 tbsp treacle
• Double cream, to serve
• Salted Treacle Sauce
• 1/2 cup dark brown sugar
• 2 tbsp pure cream
• 200g unsalted butter, chopped
• 1/4 cup treacle
• 1/4 tsp salt flakes
• Salt flakes, to serve