Yep, that's all there is to it. Very nice icing indeed. I like vanilla icing on mixed spice muffins, orange icing on orange zest and ginger muffins, vanilla on rhubarb and ginger muffins, lemon icing on lemon muffins...I could go on and on! Have fun finding your favourites.
It's the lowest cream cheese you can get - here it's Phiily Extra Light. The zest of an orange, wee bit of orange flavouring and 1/2tsp - 1tsp of ginger (depends how you like it) in your muffin. Then quark/cream cheese icing flavoured with orange flavouring and sweetener. You could even try piping the icing for prettiness. It takes a wee bit of trial and error to get your own favourites.
and, remember, that 30g Philly extra lite is a tolerated food in cruise only (and tolerated foods are limited to two a day and only if you're happy with your weight loss bla bla bla!)
Re tolerateds: If you use the muffin recipe with wheat bran and then put cream cheese icing on top, that's your entire quota of tolerateds used in a day (Jo, I know you don't count the wheat bran as a tolerated, lucky for you!).
I stick to quark icing and find this works fine so I have the option of using another tolerated in a sauce with dinner etc.
No wonder I was stalling for a while - I was having much more than 30g (more like 150g) of cream cheese icing . Maybe tofu would also make a good icing for those trying to restrict dairy - tofu is unlimited.