Preheat oven to 350° F (180° C), rack in the middle position
Melt the butter and pour it into a square 9x9x2 inch (23 x 23 x 5 cm) pan, or a 9-inch (23 cm) pie plate. Tip the pan to coat the bottom, and little of the sides of the pan.
Evenly sprinkle one ingredient from Group A over the melted butter.
Drizzle sweetened condensed coconut milk over the crumbs.
Evenly sprinkle one ingredient from Group B on top.
Evenly sprinkle one ingredient from Group C on top.
Evenly sprinkle one ingredient from Group D on top.
Press everything down with the palms of your (clean) hands.
Bake at 350° F (180° C) for 30 minutes.
Cool thoroughly on a wire rack and cut into brownie-sized bars. ½