How do I tint buttercream so it looks ivory/off white?
I believe Wilton makes an Ivory color gel that you can just color your icing with. I used it last year for a wedding I did in the winter. Turned out well. Just add a little at time. I got a little carried away and my first batch looked just a little too tan. At least I thought so.
Americolor makes one also, my Bishop cake was done with Americolor ivory. You could always use regular (brown) vanilla in your icing and it will give an ivory color.
I just used Americolor's Ivory on the recent Wedding cake in my photos, 8 drops per double batch worked good for me. She wanted a creamy wedding white not a tan.