1 teaspoon vanilla flavoring
1/2 teaspoon maple flavoring
3/4 cup powdered sugar
1 Tablespoon skim milk (more or less depending on your desired consistency)
Whisk skim milk into powdered sugar until slightly thicker than your desired consistency. Then add the flavorings. If it is still too thick then add some more milk, too thin add some sugar. But I recommend a goal of too thick because the icing is smoother if you add milk than if you add sugar back in. When you add sugar a lot of times it gets clumpier or grainier.
ETA: After I posted this I found this little Pinterest Challenge on Better Life Bags. Personally I made myself a board called THIS WEEK. It is entirely for pinning the things I intend to make from Pinterest in the current week. I pick them out on Sunday - everything from crafts with my kids to cooking and baking - then work through them all week long. So far, I'm loving it!