Cream butter in a mixing bowl with an electric mixer on medium until light and fluffy, about 2 minutes.
Add almond extract.
Gradually beat in confectioners' sugar, about a ½ cup at a time. Mix on high for 2-3 minutes.
Gently fold the marshmallow creme into the frosting by hand. Use immediately or refrigerate until ready to use in your spritz cookie sandwiches.