In a large mixing bowl, cream together the softened butter and sugar. Then add the egg and the peppermint and vanilla extracts. Mix this with an electric mixer until it’s fully mixed.
In a separate bowl, combine the flour, salt, baking powder, and powdered sugar.
Add the flour mixture into the butter mixture, and mix well.
Take your dough out of the bowl and form it into a log. You’re then going to divide your dough log into 2 equal halves.
Next, take one side of your dough log and add some red food gel to the dough. I like to use a toothpick to transfer it.
Fold your dough over the food color gel and knead the dough until the it’s a consistent red for you. If the dough needs more coloring, you can add more and knead it again until you get what you’re looking for.
Now you should have 1/2 of your dough the original white of the recipe, and half of it red. Make both of these into balls, and wrap them in plastic wrap.
These now need to chill in the refrigerator for at least 4 hours, or overnight works as well.