Love this recipe! Definitely use unsalted butter, I made it both ways with salted butter and with unsalted. Both are good, but I prefer with unsalted butter. Love the flavor. I’m going to try to make these with the lemon zest in the cookie itself as well as in the icing. Trying to stay away from sugar as much as possible. My cook time was about 11 minutes sometimes 12, so probably just my oven. I make these for the cookie corner for my church and everybody loves them. Thank you for the recipe. This photo was taken before they are iced. Also I hate to roll out cookies, so I scooped with a medium cookie scoop and pressed down With damp fingers and then with a damp saucer. This is dough is very user-friendly.