Butterscotch Banana Sponge Pudding

Sponge

• 85 g unsalted butter, soft, plus extra for greasing
• 140 g caster sugar
• 175 g self-raising flour
• 2 bananas (approx. 240 g)
• 150 g milk
• 1 large egg
• ¼ tsp fine sea salt
• 1 tsp ground cinnamon
• 1 tsp vanilla extract

Butterscotch Sauce

• 50 g unsalted butter, diced
• 130 g light brown sugar
• 30 g golden syrup
• 250 g water