For the crumble, place flour and coconut flour in a bowl. Using your fingertips, rub in the butter until it resembles fine crumbs.
Add baking powder, sugar and a pinch of salt.
Squeeze mixture together into some bigger pieces, then chill for 15 minutes or until required.
Preheat oven to 180°C. Place butter in a large ovenproof pan* over high heat, stirring continuously until butter has melted and starts to turn a nutty brown.
Add apple and cinnamon and cook, stirring occasionally, for 6-8 minutes until sauce starts to thicken slightly.
Stir in rooibos and corn flour. Scatter over the crumble.
Bake for 40-45 minutes until the crumble is golden.
Drizzle with cream to serve or enjoy as is