Butter rum cake recipe

Ingredients

• 125 g unsalted butter, plus extra for greasing the tin
• 250 g self-raising flour, plus extra for flouring the tin
• 60 g walnuts, chopped
• 30 g cornflour
• 3 tsp baking powder
• 1 tsp salt
• 4 eggs
• 200 ml whole milk
• 200 ml dark rum
• 1 tbsp vanilla extract
• 6 tbsp vegetable oil
• 300 g granulated sugar
• 1 x 75g/2.6oz packet of instant vanilla pudding mix
• 1 portion of crème fraîche or ice cream, to serve
• 125 g unsalted butter
• 75 ml water
• 150 g granulated sugar
• 1 pinch salt
• 100 ml dark rum