Use vegetable oil instead of butter—it creates a moister, chewier cookie because oil distributes more evenly than solid butter and prevents the cookies from drying out during baking.

Stir the cake mix ingredients just until combined; overmixing develops gluten and creates tough, cake-like cookies instead of the desired soft and tender texture.

Refrigerate the dough for 10-15 minutes before baking so the patriotic sprinkles stay vibrant and don't bleed into the dough or sink during baking.

Remove cookies from the oven when the edges are set but the centers still look slightly underdone—they'll continue cooking on the baking sheet and remain perfectly chewy throughout.

Let eggs sit at room temperature for 15 minutes before mixing to ensure they incorporate evenly with the cake mix, creating a more homogeneous and tender cookie dough.