To make green cookie dough, in the bowl of an electric mixer fitted with the flat beater, cream butter and sugar on medium speed until light in color and fluffy in texture. Add the egg and vanilla extract. Mix until combined. Add green food coloring and mix again until combined. Add all the flour and mix on low speed until the dough comes together. Roll out your dough between 2 pieces of plastic wrap and refrigerate for at least 30 minutes.
To make gingerbread dough, in the bowl of an electric mixer fitted with the flat beater, mix together butter, brown sugar and molasses. Add spices, flour and baking soda and start mixing again on low. With the mixer on, add 2 tbsp of water and continue mixing until the dough comes together. Roll between 2 pieces of plastic wrap and refrigerate for 30 minutes. In the meantime, preheat your oven to 375 degrees F.
Unwrap your dough and cut out your cookies. Assemble according to directions below. Bake for 12 minutes.
To make royal icing, combine all 3 ingredients in the bowl of your mixer fitted with the whisk attachment. Start on slow. When ingredients are combined, increase to high speed and mix for 7 minutes until light and fluffy.
Recipe by Sweet Explorations at http://www.sweetexplorations.com/bringing-home-the-tree/