Scrape down the sides of the bowl, then add the sugars and corn syrup. Mix until well incorporated.
Add Eggs
Scrape down the sides of the bowl again. Add the eggs one at a time, mixing thoroughly after each addition until fully combined.
Incorporate Dry Ingredients
Gradually add the flour mixture to the wet ingredients. Beat until just combined. If the dough feels too sticky, add a little more flour. If it’s too dry, add a splash of milk to adjust the texture.
Chill the Dough
Divide the dough into two portions. Wrap each portion in plastic wrap and refrigerate for at least 2 hours to firm up before rolling and cutting.
Roll Out the Dough
Once the dough has chilled, take out a small portion and let it sit at room temperature for about 15 minutes to soften slightly, making it easier to roll.
On a lightly floured surface, roll out the dough to a 1/4-inch thickness. Use cookie cutters to cut the dough into your desired shapes.
Bake
Place the shaped dough onto a baking sheet lined with parchment paper. Bake in the preheated oven for 6 to 10 minutes, or until the edges are lightly golden.
Cool and Decorate
Allow the cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely. Decorate as desired.