"Create a detailed recipe for a multi-layered, quadruple stuffed brownie with layers of dulce de leche, condensed milk, brigadeiro, and caramel. The recipe should include instructions to layer the fillings separately with brownie batter in between to keep flavors distinct and avoid excessive sweetness. Use a rich cocoa brownie base with slightly reduced sugar to balance the sweetness of the fillings. Include baking and cooling instructions for best results."