Made my oldest desperately wanted a horror cake that bled for his bday. So this is what I went with. The top tier is vanilla and raspberry. The bottom is chocolate with black cocoa buttercream. I made a thick raspberry reduction and sieved out the seeds to make ‘blood.’ I froze some of it in a 4 inch cake round to put inside the 6 inch top tier. I put it in the middle layer surrounded in buttercream so it would be contained once it thawed. Then I filled in the sides of the raspberry layer with cake cut offs an covered the whole cake with vanilla buttercream (with a drop of purple food colouring to offset the yellow). I used the drip bottle to drip more ‘blood’ around the top. It went over very well, my son and his friends were thrilled with the result. This was achieved with zero fondante and almost no dye (just a bit of purple to counteract yellows).