Sift the flour, cocoa, baking powder, and salt into a medium sized bowl.
2¼ cups all purpose flour, ⅓ cup baking cocoa, ½ teaspoon salt, ½ teaspoon baking powder
Heat your oven to 350°F and place your oven racks towards the middle of the oven.
In the bowl of your stand mixer, or a medium to large bowl if using a hand mixer, beat the butter and sugar until light and fluffy, about five minutes on medium speed with a stand mixer.
1 cup unsalted butter, ⅖ cup granulated sugar
Scrape down the bowl, add the egg, and beat on medium speed for one minute.
1 egg
Add the vanilla and peppermint extracts, and beat on medium speed for another minute.
1 teaspoon vanilla extract, 1 teaspoon peppermint extract
Add the dry ingredients and mix on low speed or by hand until the dry ingredients are fully incorporated.
Load about one-quarter of the dough into your cookie press and fit it with your desired disc. Press out cookies onto a baking sheet, leaving a small amount of space between the cookies.
Bake for 8 minutes for soft cookies, or 9 to 10 minutes for crispier cookies.
Let the cookies cool for about 5 to 10 minutes on the baking sheet before moving them to a cooling rack to cool completely before dipping in chocolate. Let the baking sheet cool completely before making another batch of cookies.
Temper the chocolate for dipping, dip, and let the cookies cool on a rack.
1 to 2 pounds dark chocolate
Spritz cookies can be stored at room temperature for several days.