Preheat the oven to 300F.
Using your stand mixer if you have one, beat the butter and powdered sugar for about 5 minutes, until light and fluffy. Use a hand mixer if you don’t have a stand mixer.
Mix in the flour, cornstarch, vanilla and almond extracts.
Dust your hands with cornstarch to stop the dough from sticking to them.
Scoop about 1 tablespoon of the dough into your hands and roll into a ball.
Place onto a parchment paper lined baking sheet and repeat with the remaining dough.
Dip a fork into the cornstarch and press down on top of the cookie ball, lightly. Top with sprinkles of your choice.
Bake for about 15 minutes in the middle of the oven. You want to bring the cookies out before they start to brown.
Transfer to a cooling rack after about 5 minutes to cool completely.