Preheat your oven to 350°F.
Cream together the sugar and mayonaisse.
Then add in the butter and mix.
Then add in the butter, vanilla, and the egg and mix until combined.
Next add in the four, baking powder, and salt and mix.
Once it's a crumbly dough, stop using a fork to mix, and start using your hands to combine it until it forms a nice cookie dough.
Split the dough into three equal pieces and put in separate bowls.
Add in the desired food coloring to each bowl and mix with your hands until the color is evenly dispersed into the dye.
Sprinkle a surface with flour, and flour your rolling pin.
Roll the dough out to about 1/4 thick and cut your cookie pieces out one at a time. The dough is soft, so transfer them to your greased cookie sheet carefully. If a detailed piece breaks off, just gently press the piece back together, and it will bake fine.
Bake them at 350°F for 6 minutes, then rotate your cookie sheet and cook for another 3 minutes.
Remove them from the oven and leave them on the baking sheet to let the pan continue to cooke them while they cool for five minutes.
After five minutes, move them to the cooling rack to let them finish cooling completely.
Use the cookie icing to attach the details to each cookie. I added snow and ice crystal sprinkles to the runners of the sleigh, ornaments and a star for the Christmas tree, and an eye and a red nose for the reindeer.