Bake and cool brownies, about 1 1/2 in. thick. Mark 4 graves, each 2 x 4 3/4 in. Scoop out 3, about 3/4 in. deep, and scatter crumbled brownie "dirt" around graves and over 4th grave. Position candy mummies, head, hands and tombstones. Attach icing decorations around sides with melted candy. Scatter tinted coconut grass.