Preheat your oven to 350°F and line your baking sheet (consider these reusable baking mats for a more sustainable option). In a large mixing bowl, use a hand mixer to cream your butter and sugar together until smooth and aerated (2-3 minutes). 1 cup unsalted butter, 1 cup granulated sugar
Add your eggs and vanilla and almond extracts and mix to combine.
1 teaspoon vanilla extract, ¼ teaspoon almond extract, 2 large eggs
Add the flour, salt, cornstarch, and baking powder and mix again. Use a spatula to scrape down any dry ingredients clinging to the inside of the bowl, integrating all of the ingredients until smooth.
2 ½ cups all-purpose flour + more for flouring surface, 1 teaspoon baking powder, 2 tablespoons cornstarch, ½ teaspoon salt
Generously flour a clean surface (I like to use a large, rectangular cutting board) and rolling pin. Turn the dough out onto the floured surface and use the rolling pin to flatten it until it is about ½ inch thick.
Add the sprinkles and spread them out in an even layer on top of the dough. Lightly press down so the sprinkles adhere to the cookie dough.
½ cup Halloween sprinkles
Use Halloween cookie cutters to cut out whichever shapes of cookies you like, then carefully peel the cookies off the cutting board and place them on your lined baking sheet, leaving at least an inch of space in between each cookie. Take the leftover dough and use clean hands to form it into a ball. Use your rolling pin to roll it out again to cut more cookies. Add more sprinkles as needed. Repeat until all the cookie dough is used up.
Bake for 8-10 minutes and allow to cool completely on your baking sheet before transferring them to a plate to enjoy.