New England spider cake

Name: New England spider cake
Prep time: 15 min
Cook time: 1 h
Total time: 1 h 15 min
Cuisine: American
Ingredients: 500 ml (2 cups) milk; 60 ml (1/4 cup) lemon juice; 165 gm (3/4 cup) caster sugar; 130 gm coarse polenta; 110 gm (3/4 cup) plain flour; ¾ tsp baking powder; 2 eggs; Scraped seeds of 1 vanilla bean or 1 tsp vanilla bean paste; Pinch of ground cinnamon, plus extra to serve; 20 gm butter, diced; 200 ml pouring cream; Pure icing sugar, for dusting (optional); Maple Syrup, to serve