I have no clue where to place dowel rods in my cake to make it hold up.
I am making a two tier cake today.
The bottom tier is a 2-layer, 10-inch square and the top tier is a 3 layer, 8-inch round. I think i need to at least dowel the bottom tier so it holds up the weight of the top.
Suggestions please

Center an 8" round cardboard on top of the 10" square and lightly mark the icing with a toothpick. Find the "high" spot icing in the area of the 8" circle and cut one dowel (I use straws--easy to cut) so that it's about 1/8th inch above the icing. Remove it and cut 6 (2 if using straws), or 7 (3 if using straws) more, exactly the same length. Place the dowels/straws fairly evenly spaced within the 8" circle.

The 8" cake must be on a cake board the same size.

HTH
Rae