Preheat the oven to 350 degrees Fahrenheit.
In the bowl of a stand mixer or a large mixing bowl, add the room temperature butter and sugar.
Beat together for about 30 seconds.
Beat in the vanilla and apple sauce until combined.
Add in all remaining ingredients aside from the sprinkles and beat just until combined. Be sure to spoon and level the flour into the measuring cup, don't scoop straight from the bag.
Use a rubber spatula to fold in the sprinkles until well incorporated. Place the dough in the fridge for 15 minutes.
Use a medium cookie scoop or about 1 1/2 tbsp and add the dough to a baking sheet lined with parchment paper. Bake for 11-15 minutes (mine are perfect at 13) or until the edges are just golden brown. They will continue to firm up as they cool, so take them out a bit earlier than you think is necessary if you want a really chewy center.
Let cool on the baking sheet for about 10 minutes, then transfer to a wire rack to finish cooling. Enjoy!