WMUTeach, Jenny Doan shows some Cake Mix Recipes on these tutorials:
https://www.youtube.com/watch?v=cMzbLPmHw8A
https://www.youtube.com/watch?v=mx_GV7FJ2-g
But, I think you could choose any block you like, stack the 10" pieces, cut out part of the pieces to the block pattern, then use a solid or blender for the other pieces of the block.