Boterkoek (Dutch Butter Cake)

Preheat the oven to 180°C/350˚F (conventional oven).

Place the softened butter and sugar in the bowl of a stand mixer and whisk until creamy.

Add the flour and salt and knead by hand until you have a smooth dough. Divide into two pieces.

Line the base of a square or round cake tin with baking parchment (not a springform tin) and place the first half of the pastry on top. Flatten with your fingers and a spoon.

Using a teaspoon, sprinkle dollops of dulce de leche over the base. Sprinkle with the chopped chocolate and cover with the second half of the pastry.