To make the buttery shortbread cookies, melt the white chocolate in a bowl either in the microwave or above steam on the stove, whichever is handier for you. Mix in the flour, baking powder, and salt with the white chocolate.
Separately, in a mixer, beat the butter and sugar for 4-5 minutes on medium. Add the egg and vanilla extract to the butter and sugar and gently mix them together. Gently form a dough from the ingredients.
If you have enough space, roll out the dough to ½ inch thick and refrigerate it this way for an hour to chill. If you don’t have much space, cover the dough ball in plastic and chill it for an hour, and after that, roll it out to the above-mentioned ½ inch thickness. Cut the cookies with a snowman cookie cutter, or any other shape you wish to make.
Preheat the oven to 350 degrees, and place the cookies on a baking sheet lined with parchment paper. If there is too much dough to bake in one go, just keep the rest of it in the fridge until you bake them.
Bake them for 10 minutes, and let them cool off completely before decorating. Until your fancy cookies cool off, it’s time to make the royal icing.
Beat the egg whites in a mixer with the peppermint and vanilla extract until they start to become fluffy. Start by gradually mixing in the sugar at a low speed until the icing is smooth and shiny.
Separate the icing and mix it with the food coloring. Start by lining the body of the snowman with plain white and letting it set. Follow it with the black parts, and draw a hat, eyes, buttons, and a smile for the snowman. Leave the orange and the colorful scarf for last, because they need the least amount of icing.
Let the cookies properly cool down, not to mess up the decorating.