The best way to make homemade Christmas cookies is to start with the right ingredients. You'll need flour, sugar, butter, eggs, vanilla extract, baking powder, and salt. Then you can add in any additional ingredients you want to give your cookies a unique flavor, like chocolate chips, nuts, or peppermint extract. Once you have your ingredients, mix them all together in a large bowl, then roll the dough out on a lightly floured surface. Cut out your cookies using festive cookie cutters and bake them in a preheated oven. Once they're done, enjoy!