Extra needed: a baking tin of 20 x 30 cmcovered with baking paper and greased
Preheat the oven to 180 C.
Add the butter with the sugar and flour into a large bowl and rub it with your fingerstips until it resembles a crumbly mixture.
Press this mixture into your baking tin and bake into the preheated oven for about 15 minutes or until golden.
Remove from the oven and leave to cool. Spread with dulce de leche. Add the pecan's on top of that with 1/2 tsp of salt. Leave to set in the fridge for 30 minutes.
Melt the chocolate in a double broiler and pour this over the cooled dulce de leche layer and smooth the top with a knife or spatula. Leave to set in the fridge for another 30 minutes. Cut into small squares and serve.