Prepare a large baking sheet with parchment paper and preheat the oven to 375°F.
In a medium mixing bowl, whisk together the sifted all-purpose flour, baking powder, baking soda, and kosher salt.
1¼ cups all-purpose flour, ½ teaspoon baking powder, ½ teaspoon baking soda, ½ teaspoon kosher salt
In a large bowl or stand mixer fitted with a paddle attachment, cream together the butters, granulated sugar, and brown sugar until smooth.
½ cup unsalted butter, ½ cup creamy peanut butter, ½ cup granulated sugar, ½ cup light brown sugar
Add the egg and vanilla extract and continue to mix until light and fluffy.
1 large egg, ½ teaspoon vanilla extract
Slowly add the dry ingredients and mix until combined. Be sure to scrape down the sides as needed.
Portion out the cookie dough with a medium cookie scoop and drop it onto the prepared baking sheet at least 2 inches apart.
Use a fork to gently press them down, crisscrossing the tines of the fork by doing two presses per cookie, keeping the round shape intact.
Bake for 10 to 12 minutes. Remove from the oven, transfer to a cooling rack, and allow them to cool completely.
In a small mixing bowl, melt the chocolate chips in the microwave for 1 minute and stir, then at 30-second intervals, stirring between each one, until the chocolate has melted completely.
2 cup semi-sweet chocolate chips
Stir the coconut or vegetable oil into the chocolate until smooth.
2 teaspoon coconut or vegetable oil
Dip each cookie halfway into the melted chocolate. Then set each dipped cookie on parchment paper and sprinkle with your favorite holiday sprinkles. Allow chocolate-dipped cookies to set for 1 hour.
3 tablespoons holiday sprinkles