When you post there is an icon of a globe with what looks like and infinity symbol (but probably is two links in a chain). If you click that a little pop up will ask for what you want to link (I just copy/paste the URL). Two sets of brackets will show with the link copied twice. You can change the text between the brackets but don't change the one in the brackets (URL=www).
I love Sweet Cakes - they are local for me and one of the first companies I used for FO. I very much dislike Irish Spring though - never bought the soap before I started making my own because I didn't like the smell.