My first two attempts failed miserably - the cookies expanded and flattened out in the oven and looked like swollen thumbs. I used a basic sugar cookie dough.
Frustrated with my failure, I tried again with some left-over store-bought shortcrust pasty dough and surprisingly they retained their shape though they didn't look like what I wanted them to be. Besides, they tasted like pie crust!
Any idea what went wrong?