MAPLE BUTTERCREAM FROSTING

1/3 cup unbleached all-purpose flour
1 cup nonfat (skim) milk
1/2 cup butter, softened
3/4 cup pure maple syrup
1 teaspoon pure vanilla extract

In a small saucepan, whisk together flour and milk. Cook over medium heat, stirring constantly, until mixture is a thick paste, 2 to 3 minutes. Remove from heat and cool in refrigerator at least 1 hour.

In a medium bowl, combine butter, maple syrup, vanilla, and cooled paste and beat with an electric mixer until smooth and creamy. Chill in refrigerator at least 90 minutes before using.

"With its deep, rich maple flavor, this creamy, easy-to-work-with frosting is a perfect complement to apple or spice cake."

Makes enough frosting for a 2-layer, 9-inch cake.
Source: Krystine's Healthy Gourmet Bakery Cookbook by Krystine Crowell