Spent the 25th baking these - starting from left, clockwise: chocolate chips with chewy caramel center, cream cheese & chocolate chips, and vanilla/chocolate cake pudding cookies. Homemade sucre à la crème (“sugar cream”, or fudge?) sauce on the side.
All these colors were achieved with red, yellow, blue, and green food coloring mixed into white frosting. The amount of drops needed for the color you want is underneath the icing color. So convenient. :)