Line the bottom of a square springform pan (24 x 24 cm) with baking paper. Melt 75 g butter in a wide saucepan. Add 400 g sugar. Caramelise at low to medium heat while stirring until light brown.
Deglaze with 600 g whipped cream. Add 80 g grated coconut. Bring everything to the boil. Simmer for about 1 1⁄4 hours until the mixture is thick and creamy, stirring frequently (stir constantly at the end).
Roast 20 g of coconut rape in a pan without fat until golden brown. Leave to cool. Pour caramel mass into the mould. Let cool for about 20 minutes. Sprinkle with roasted coconut. Let it set overnight.
Remove the caramel from the pan, turn it over on a board, remove the baking paper. Cut the caramel into pieces of about 5 cm (e.g. rhombs). Store in a cool, dry and airtight place.