Does a 14X14X2 square  (2 layer cake) need dowel rods?  I am going to have a 1/4 inch masonite board underneath it.  

Would two heating cores work well or just one for each of my layers?

What's the best way to flip and stack it together?  

Thanks,

Lindsey

dowel rods are used to support a second tier of cake, i.e. two or more complete cakes that are stacked on top of each other.  A single layer cake measuring 2" (or even a torted, two layer cake totaling 4" ) would not require dowel rods.  

heating cores wouldn't hurt. i usually use upside down flower nails on large diameter tiers. 

chill the cakes well (overnight or for a 4-5 hours) to make the cakes easier to fill, frost and position.  I wouldn't flip a cake that size onto its base to assemble.  I would slide the cake off of a cake board and onto the filled base layer. 

good luck