Why do my cakes tear apart?!
Answers:
I read up on your problem & found this info for you:
CAKE FALLING APART
- too much baking powder/baking soda, sugar, or fat
- improper mixing
- oven temperature too low
http://www.joyofbaking.com/ButterCakeTro…
Cracks & crumbles:
Too much shortening, baking powder, or sugar.
Taken the cake from the pan before it had cooled enough.
The layers may have needed a little extra baking time
http://www.baking911.com/cakes/problems.… & Crumbles
Are you using the same recipe? If so, it might be flawed. Too much flour, not enough fat can make a cake break. Everything should be super fresh including baking powder/soda. Extra eggs might help, but I think there are other issues here.