re: How to get crisp fondant edges on a square buttercream cake .

Hey, that first link is mine! Thanks for the referral, Goretti! I usually don’t go for that sharp corner look on fondant, but when I do I’ll use figertips on each side of the cake to run down the corners in a smooth motion. My fingertips will touch together and almost pinch the fondant, definitely leaving a crease. It might take a few passes to get it where you want it to be. I hope that made sense.