Maple Fudge Frosting

I wanted to make a butter pecan cake with this maple fudge frosting for my husbands birthday tomorrow, but sadly I was vetoed by the birthday boy. 

• 3 ounces butter
• 4 ounces soft brown sugar
• 2 tablespoons cold strong coffee
• 1 tablespoon maple syrup
• 1 tablespoon milk
• 1 -2 tablespoon maple extract, to taste
• 8 ounces icing sugar

Instructions:

1. Place all of the ingredients, except the icing sugar, into a saucepan and gently them all together until the sugar is dissolved. Allow to cool slightly and then add the icing sugar, beating to a smooth and glossy finish.
2. Spread evenly on cake.